Dyfyniad APA

Heywood, V. H. (1976). Botanical systematics: An occassional series of monographs. Acadamic Press.

Dyfyniad Arddull Chicago

Heywood, V H. Botanical Systematics: An Occassional Series of Monographs. London: Acadamic Press, 1976.

Dyfyniad MLA

Heywood, V H. Botanical Systematics: An Occassional Series of Monographs. Acadamic Press, 1976.

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