Citazione Stile APA (7a Edizione)

Enger, E. D., & Smith, B. F. (1992). Environmental science: A study of interrelationships (4th ed.). W.C. Brown.

Citazione stile Chigago Style (17a edizione)

Enger, Eldon D., e Bradley F. Smith. Environmental Science: A Study of Interrelationships. 4th ed. Michigan: W.C. Brown, 1992.

Citatione MLA (9a ed.)

Enger, Eldon D., e Bradley F. Smith. Environmental Science: A Study of Interrelationships. 4th ed. W.C. Brown, 1992.