Dyfyniad APA

Jurek, D., & MacDonald, S. (1989). Discovering the world: Biological science. DLM.

Dyfyniad Arddull Chicago

Jurek, Dianne, and Sharon MacDonald. Discovering the World: Biological Science. Texas: DLM, 1989.

Dyfyniad MLA

Jurek, Dianne, and Sharon MacDonald. Discovering the World: Biological Science. DLM, 1989.

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