Dyfyniad APA

Heywood, V. H. (1971). biology and chemistry of Umbelliferae. Academic Press.

Dyfyniad Arddull Chicago

Heywood, V H. Biology and Chemistry of Umbelliferae. London: Academic Press, 1971.

Dyfyniad MLA

Heywood, V H. Biology and Chemistry of Umbelliferae. Academic Press, 1971.

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