Cita APA (7th ed.)

Briggs, D., & Walters, S. (1984). Plant variation and evolution (2nd ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Briggs, D., i S.M Walters. Plant Variation and Evolution. 2nd ed. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1984.

Cita MLA (9th ed.)

Briggs, D., i S.M Walters. Plant Variation and Evolution. 2nd ed. Cambridge University Press, 1984.