Dyfyniad APA

Briggs,D, & walters,s m. (1990). Plant variation and evolution. Cambridge University Press.

Dyfyniad Arddull Chicago

Briggs,D, and walters,s m. Plant Variation and Evolution. United Kingdom: Cambridge University Press, 1990.

Dyfyniad MLA

Briggs,D, and walters,s m. Plant Variation and Evolution. Cambridge University Press, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.