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.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.