APA Style

Chicago, U, O. (1983). Encyclopedia Britannica Marcopedia Volume 2 : Knowledge in Depth (15th). Somerville, USA: Encyclopedia Britannica, Inc..

MLA Style

Chicago, University, Of. "Encyclopedia Britannica Marcopedia Volume 2 : Knowledge in Depth". 15th Somerville, USA: Encyclopedia Britannica, Inc., 1983. BOOK.