Cita APA (7a ed.)

Briggs, D., & Walters, S. (1969). Plant variation and evolution (2nd edition.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Briggs, D., y S.M Walters. Plant Variation and Evolution. 2nd edition. London: Cambridge University Press, 1969.

Cita MLA (8a ed.)

Briggs, D., y S.M Walters. Plant Variation and Evolution. 2nd edition. Cambridge University Press, 1969.