Citazione Stile APA (7a Edizione)

Masons, W. H., & Folkerts, G. W. (1979). Environmental problems: Principles, readings, and comments (2nd ed.). Wm.C.Brown.

Citazione stile Chigago Style (17a edizione)

Masons, Williams H., e George W. Folkerts. Environmental Problems: Principles, Readings, and Comments. 2nd ed. Dubuque, IA: Wm.C.Brown, 1979.

Citatione MLA (9a ed.)

Masons, Williams H., e George W. Folkerts. Environmental Problems: Principles, Readings, and Comments. 2nd ed. Wm.C.Brown, 1979.