Gaya APA

Howarth, W. (1971). McGraw-Hill Encyclopedia of Science and Technology Volume 14 Tow-Zyt . New York: McGraw-Hill Book Company.

Gaya MLA

Howarth, William. "McGraw-Hill Encyclopedia of Science and Technology Volume 14 Tow-Zyt". New York: McGraw-Hill Book Company, 1971. Text.