MLA

Format:

Author of Specific Entry Last, First. "Title of Entry." Title. edition # ed.
          Year of Publication. Print.

[Note on Authors: If an entry in an encyclopedia or other reference work is not signed by an author, the citation will begin with the title of the entry. Do not include the names of editors in an MLA citation for this type of text.]

[Note on Editions: For a text published yearly without an edition number, include year instead of edition number.]

Sample Citation:

Smith, Hobart. "Horned Lizard." Encyclopedia Americana. 2004 ed. Print.

For more information on citing reference sources, see pages 160-161 in the MLA Handbook, 7th edition.
 

APA

Format:

Editor Last, First Initial (Ed.). (Year of Pub.) Title (# of edition ed., Vols.
          # of volumes). Location of Publisher: Publisher.

Sample Citation:

Shally-Jensen, M., et al. (Eds.) (2004). Encyclopedia Americana (2004 ed.,
          Vols. 30). Danbury: Scholastic Library Publishing.

Stout, J.J. (2004). Hydroelectric power. In M. Shally-Jensen, et al., Encyclopedia
          Americana (2004 ed., Vols. 30). Danbury: Scholastic Library Publishing.

Sample In-Text Reference:

(Shally-Jensen, 2004)

(Stout, 2004, p. 913)

For more information, see page 204 in the APA Publication Manual, 6th ed.
 

Chicago
(Notes)

[Note: The Chicago style suggests that common reference works such as encyclopedias and dictionaries be included in notes and excluded from the bibliography.] 

Format:

          Note number. Title, # edition., s.v. "Title of entry."

Sample Note:

          23. Encyclopedia Americana, 2004 ed., s.v. "Horned Lizard."

[Note: The "s.v." in the entry stands for sub verbo, or "under the word." The plural form is "s.v.v."]

For more information, see pages 715-716 in the Chicago Manual of Style, 15th ed.
 

Chicago
(Author-Date)

The Chicago style suggests that only specialized encyclopedias, dictionaries, and other reference works be included in the list of References.  For more information, see pages 715-716 in the Chicago Manual of Style, 15th ed.

ASA

The ASA style does not include specific instructions for citing encyclopedias, dictionaries, and other reference works. The following examples are for multi-volume works.

Format:

Author Last, First. Year of Pub. Title of Series. Vol. #, Title of Volume.
          Publisher Location: Publisher.

Sample Citation:

Gulla, Bob. 2006. Greenwood Encyclopedia of the History of Rock. Vol. 6,
          The Grunge and Post-Grunge Years, 1991-2005. Westport, CT:
          Greenwood Press.

Sample In-Text Reference:

(Gulla 2006: 67)

For more information, see pages 47-48 the ASA Style Guide, 3rd edition.
 

Turabian

(Notes)

[Note: The Turabian Notes style suggests that common reference works such as encyclopedias and dictionaries be included in notes and excluded from the bibliography.] 

Format:

          Note number. Title, # edition., s.v. "Title of entry"

Sample Note:

          23. Encyclopedia Americana, 2004 ed., s.v. "Horned Lizard."

[Note: The "s.v." in the entry stands for sub verbo, or "under the word." The plural form is "s.v.v."]

For more information, see pages 191-192 in the Turabian Manual, 7th edition.
 

Turabian

(Author-Date)

[Note: The Turabian Author-Date style suggests that common reference works such as encyclopedias and dictionaries be included only in the text as a parenthetical reference.]

Format:

(Title # of ed., s.v. "Title of Entry")

Sample In-Text Reference:

(Encyclopedia Americana 2004 ed., s.v. "Horned Lizard")

For more information, see page 257 in the Turabian Manual, 7th edition.