APA Style

Britannica, E. (1978). Encylopaedia Britannica XV : Macropaedia Proboscidea Rubber (15th). Chicago: The University of Chicago Press.

MLA Style

Britannica, Encyclopaedia. "Encylopaedia Britannica XV : Macropaedia Proboscidea Rubber". 15th Chicago: The University of Chicago Press, 1978. Hardcover.