Dyfyniad APA

Cowen, R. (1996). Beyond discovery: The ozone depletion phenomenon. National Aademy of Sciences.

Dyfyniad Arddull Chicago

Cowen, Ron. Beyond Discovery: The Ozone Depletion Phenomenon. [Washington, D.C.]: National Aademy of Sciences, 1996.

Dyfyniad MLA

Cowen, Ron. Beyond Discovery: The Ozone Depletion Phenomenon. National Aademy of Sciences, 1996.

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