Cita APA (7th ed.)

Hampel, C. A., & Hawley, G. G. (1973). The Encyclopedia of chemistry (3d ed.). Van Nostrand Reinhold.

Cita Chicago (17th ed.)

Hampel, Clifford A., i Gessner Goodrich Hawley. The Encyclopedia of Chemistry. 3d ed. New York: Van Nostrand Reinhold, 1973.

Cita MLA (9th ed.)

Hampel, Clifford A., i Gessner Goodrich Hawley. The Encyclopedia of Chemistry. 3d ed. Van Nostrand Reinhold, 1973.