Cita APA (7th ed.)

GYMER, R. G. (1977). Chemistry in the natural world. D.C. Heat and Company.

Cita Chicago (17th ed.)

GYMER, Roger G. Chemistry in the Natural World. Lexington: D.C. Heat and Company, 1977.

Cita MLA (9th ed.)

GYMER, Roger G. Chemistry in the Natural World. D.C. Heat and Company, 1977.