Dyfyniad APA

Enger, E. D. (2000). Environmental science: A study of interrelationships. Boston, Mass: McGraw-Hill.

Dyfyniad Arddull Chicago

Enger, Eldon D. Environmental Science: A Study of Interrelationships. Boston, Mass: McGraw-Hill, 2000.

Dyfyniad MLA

Enger, Eldon D. Environmental Science: A Study of Interrelationships. Boston, Mass: McGraw-Hill, 2000.

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