Dyfyniad APA

Drexler, M. (2003). Secret agents: The menace of emerging infections. Penguin Books.

Dyfyniad Arddull Chicago

Drexler, Madeline. Secret Agents: The Menace of Emerging Infections. New York, N.Y: Penguin Books, 2003.

Dyfyniad MLA

Drexler, Madeline. Secret Agents: The Menace of Emerging Infections. Penguin Books, 2003.

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