Dyfyniad APA

Reid, W. V., & Miller, K. R. (1989). Keeping options alive: The scientific basis for conserving biodiversity. World Resources Institute.

Dyfyniad Arddull Chicago

Reid, Walter V., and Kenton R. Miller. Keeping Options Alive: The Scientific Basis for Conserving Biodiversity. Washington, D.C: World Resources Institute, 1989.

Dyfyniad MLA

Reid, Walter V., and Kenton R. Miller. Keeping Options Alive: The Scientific Basis for Conserving Biodiversity. World Resources Institute, 1989.

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