Dyfyniad APA

Conningham,William P, & Saigo Barbara Woodworth. (1990). Environmental science: A global concern. Brown Publishers.

Dyfyniad Arddull Chicago

Conningham,William P, and Saigo Barbara Woodworth. Environmental Science: A Global Concern. Boston: Brown Publishers, 1990.

Dyfyniad MLA

Conningham,William P, and Saigo Barbara Woodworth. Environmental Science: A Global Concern. Brown Publishers, 1990.

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