Dyfyniad APA

ebrary, Inc. (1990). The search for life's origins: Progress and future directions in planetary biology and chemical evolution. National Academy Press.

Dyfyniad Arddull Chicago

ebrary, Inc. The Search for Life's Origins: Progress and Future Directions in Planetary Biology and Chemical Evolution. Washington, D.C.: National Academy Press, 1990.

Dyfyniad MLA

ebrary, Inc. The Search for Life's Origins: Progress and Future Directions in Planetary Biology and Chemical Evolution. National Academy Press, 1990.

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