Dyfyniad APA

Cunningham, W. P., & Saigo, B. W. (1997). Environmental Science: A Global Concern. Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P., và Barbara Woodworth Saigo. Environmental Science: A Global Concern. Boston: McGraw-Hill, 1997.

Dyfyniad MLA

Cunningham, William P., và Barbara Woodworth Saigo. Environmental Science: A Global Concern. Boston: McGraw-Hill, 1997.

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