Dyfyniad APA
ebrary, Inc, & Vries, M. d. (2010). Protecting marine mammals. Nova Science.
Dyfyniad Arddull Chicago
ebrary, Inc, and Marielle de Vries. Protecting Marine Mammals. New York: Nova Science, 2010.
Dyfyniad MLA
ebrary, Inc, and Marielle de Vries. Protecting Marine Mammals. Nova Science, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.