Cite a reference volume in APA style by listing the author, the publication date, the title of the entry, the title of the reference volume, the volume number, page number, publishing location and publisher. For example: Smith, A. (1997). Physics. In The physics encyclopedia. (Vol. 34, pp.204-246). New York, NY: Science Encyclopedia.
Cite in-text for APA with the author's last name and the year of publication in parentheses. For example: (Smith, 1997).
Cite a reference volume in MLA by using the name of the entry, the title of the reference book, which edition, the year of publication and the medium of publication. For example: "Physics." The Physics Encyclopedia. 2nd ed. 1997. Print.
Cite in-text for MLA by using the author's name and the page numbers referenced in parentheses. For example: (Smith, 204-246).