Cita APA (7a ed.)

Crawley, M. L., & Cusack, M. (1980). The american landscape: A historical perspective. MetaTech Corp..

Cita Chicago Style (17a ed.)

Crawley, Martha L., y Michael Cusack. The American Landscape: A Historical Perspective. Arlington, Va.: MetaTech Corp., 1980.

Cita MLA (8a ed.)

Crawley, Martha L., y Michael Cusack. The American Landscape: A Historical Perspective. MetaTech Corp., 1980.