Cita APA (7th ed.)

Tompkins, P., & Bird Christopher. (1973). The secret life of plants. Harper & Row Publishers.

Cita Chicago (17th ed.)

Tompkins, Peter, i Bird Christopher. The Secret Life of Plants. New York: Harper & Row Publishers, 1973.

Cita MLA (9th ed.)

Tompkins, Peter, i Bird Christopher. The Secret Life of Plants. Harper & Row Publishers, 1973.