Cita APA (7a ed.)

Clausen, J., Keck, D. D., & Hiesey, W. M. (1940). Effect of varied environments on western north american plants. Carnegie Institution.

Cita Chicago Style (17a ed.)

Clausen, Jens, David D. Keck, y William M. Hiesey. Effect of Varied Environments on Western North American Plants. Washington: Carnegie Institution, 1940.

Cita MLA (8a ed.)

Clausen, Jens, et al. Effect of Varied Environments on Western North American Plants. Carnegie Institution, 1940.