Dyfyniad APA

Sheldon, S. (2000). The sky is falling. W. Morrow.

Dyfyniad Arddull Chicago

Sheldon, Sidney. The Sky Is Falling. New York: W. Morrow, 2000.

Dyfyniad MLA

Sheldon, Sidney. The Sky Is Falling. W. Morrow, 2000.

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