APA (7th ed.) Citation

Gessner G. Hawley. (1973). The encyclopedia of chemistry (3d ed.). Van Nostrand Reinhold.

Chicago Style (17th ed.) Citation

Gessner G. Hawley. The Encyclopedia of Chemistry. 3d ed. New York: Van Nostrand Reinhold, 1973.

MLA (9th ed.) Citation

Gessner G. Hawley. The Encyclopedia of Chemistry. 3d ed. Van Nostrand Reinhold, 1973.