Dyfyniad APA

Walton, J. (1953). Introduction to the study of fossil plants (2nd ed.). Adam &Charles Black.

Dyfyniad Arddull Chicago

Walton, John. Introduction to the Study of Fossil Plants. 2nd ed. London: Adam &Charles Black, 1953.

Dyfyniad MLA

Walton, John. Introduction to the Study of Fossil Plants. 2nd ed. Adam &Charles Black, 1953.

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