Dyfyniad APA

Raven, P. H., Curtis, H., & Evert, R. F. (1981). Biology of plants (3rd ed.). New York, N.Y.: Worth Publishers.

Dyfyniad Arddull Chicago

Raven, Peter H., Helena Curtis, và Ray Franklin Evert. Biology of Plants. 3rd ed. New York, N.Y.: Worth Publishers, 1981.

Dyfyniad MLA

Raven, Peter H., Helena Curtis, và Ray Franklin Evert. Biology of Plants. 3rd ed. New York, N.Y.: Worth Publishers, 1981.

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