Dyfyniad APA

Smith, R. L. (1995). Ecology and field biology (5th ed.). Harper Collins.

Dyfyniad Arddull Chicago

Smith, Robert Leo. Ecology and Field Biology. 5th ed. New York: Harper Collins, 1995.

Dyfyniad MLA

Smith, Robert Leo. Ecology and Field Biology. 5th ed. Harper Collins, 1995.

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