Dyfyniad APA
Silver, C. S., & DeFries, R. S. (1990). One earth, one future: Our changing global environment. National Academy Press.
Dyfyniad Arddull Chicago
Silver, Cheryl Simon, and Ruth S. DeFries. One Earth, One Future: Our Changing Global Environment. Washington, D.C.: National Academy Press, 1990.
Dyfyniad MLA
Silver, Cheryl Simon, and Ruth S. DeFries. One Earth, One Future: Our Changing Global Environment. National Academy Press, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.