APA استشهاد

Hampel, C. A., & Hawley, G. G. (1973). encyclopaedia of chemistry (3rd ed.). Van Nostrand Reinhold Company.

استشهاد بنمط شيكاغو

Hampel, Clifford A., و Gessner G. Hawley. Encyclopaedia of Chemistry. 3rd ed. New York: Van Nostrand Reinhold Company, 1973.

MLA استشهاد

Hampel, Clifford A., و Gessner G. Hawley. Encyclopaedia of Chemistry. 3rd ed. Van Nostrand Reinhold Company, 1973.