Dyfyniad APA

Öpik, H. (2005). The physiology of flowering plants. Cambridge, UK: Cambridge University Press.

Dyfyniad Arddull Chicago

Öpik, Helgi. The Physiology of Flowering Plants. Cambridge, UK: Cambridge University Press, 2005.

Dyfyniad MLA

Öpik, Helgi. The Physiology of Flowering Plants. Cambridge, UK: Cambridge University Press, 2005.

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