Dyfyniad APA

Snicket, L., & Helquist, B. (2003). The slippery slope. HarperCollins.

Dyfyniad Arddull Chicago

Snicket, Lemony, and Brett Helquist. The Slippery Slope. New York: HarperCollins, 2003.

Dyfyniad MLA

Snicket, Lemony, and Brett Helquist. The Slippery Slope. HarperCollins, 2003.

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