APA Style

Benton, W. (1973). Encyclopedia Britannica Macropedia Knowledge in Depth 16 : Rubena - Somalia . Chicago: Encyclopaedia Britannica, Inc.

MLA Style

Benton, William. "Encyclopedia Britannica Macropedia Knowledge in Depth 16 : Rubena - Somalia". Chicago: Encyclopaedia Britannica, Inc, 1973. Text.