Cita APA (7a ed.)

Briggs, D., & Walters, S. M. (1997). Plant variation and evolution (3rd ed.). University Press.

Cita Chicago Style (17a ed.)

Briggs, Derek, y S. M. Walters. Plant Variation and Evolution. 3rd ed. Cambridge: University Press, 1997.

Cita MLA (9a ed.)

Briggs, Derek, y S. M. Walters. Plant Variation and Evolution. 3rd ed. University Press, 1997.