Cita APA (7a ed.)

Enger, E. D., & Smith, B. F. (1992). Environmental science: A study of interrelatioships (4th ed.). WCB.

Cita Chicago Style (17a ed.)

Enger, Eldon D., y Bradley F. Smith. Environmental Science: A Study of Interrelatioships. 4th ed. [S.L.]: WCB, 1992.

Cita MLA (8a ed.)

Enger, Eldon D., y Bradley F. Smith. Environmental Science: A Study of Interrelatioships. 4th ed. WCB, 1992.