Dyfyniad APA

Dasmann, R. F. (1976). Environmental conservation (4th ed.). John Wiley & Sons.

Dyfyniad Arddull Chicago

Dasmann, Raymond F. Environmental Conservation. 4th ed. New York: John Wiley & Sons, 1976.

Dyfyniad MLA

Dasmann, Raymond F. Environmental Conservation. 4th ed. John Wiley & Sons, 1976.

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