Gaya APA

Parker, S, P. (1987). McGraw-Hill Encyclopedia of Science & Technology; An International Reference Work In Twenty Volumes Including An Index (6th Edition) Volume 15 . New York: McGraw-Hill Book Company.

Gaya MLA

Parker, Sybil, P.. "McGraw-Hill Encyclopedia of Science & Technology; An International Reference Work In Twenty Volumes Including An Index (6th Edition) Volume 15". New York: McGraw-Hill Book Company, 1987. Text.