Cita APA (7a ed.)

Steinbeck, E. A., Tiffney, W. N., Shillinglaw, S., & Beegel, S. F. (1997). Steinbeck and the Environment: Interdisciplinary Approaches. University of Alabama Press.

Cita Chicago Style (17a ed.)

Steinbeck, Elaine A., Wesley N. Tiffney, Susan Shillinglaw, y Susan F. Beegel. Steinbeck and the Environment: Interdisciplinary Approaches. Tuscaloosa: University of Alabama Press, 1997.

Cita MLA (8a ed.)

Steinbeck, Elaine A., et al. Steinbeck and the Environment: Interdisciplinary Approaches. University of Alabama Press, 1997.