Dyfyniad APA

Cunningham, W. P., Cunningham, M. A., & Saigo, B. W. (2005). Environmental science: A global concern (8th ed.). New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P., Mary Ann Cunningham, và Barbara Woodworth Saigo. Environmental Science: A Global Concern. 8th ed. New York: McGraw-Hill, 2005.

Dyfyniad MLA

Cunningham, William P., Mary Ann Cunningham, và Barbara Woodworth Saigo. Environmental Science: A Global Concern. 8th ed. New York: McGraw-Hill, 2005.

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