Dyfyniad APA

Cunningham, W. a. B. W. S., & Saigo, B. W. (2001). Environmental science: A global concern (Sixth Edition.). McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William and Barbara Woodworth Saigo, and Barbara Woodworth Saigo. Environmental Science: A Global Concern. Sixth Edition. New York: McGraw-Hill, 2001.

Dyfyniad MLA

Cunningham, William and Barbara Woodworth Saigo, and Barbara Woodworth Saigo. Environmental Science: A Global Concern. Sixth Edition. McGraw-Hill, 2001.

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