Dyfyniad APA

RYCKMAN, W. (1983). The art of writing clearly. Dow Jones-Irwin.

Dyfyniad Arddull Chicago

RYCKMAN, W.G. The Art of Writing Clearly. Illinois: Dow Jones-Irwin, 1983.

Dyfyniad MLA

RYCKMAN, W.G. The Art of Writing Clearly. Dow Jones-Irwin, 1983.

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