Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.