Dyfyniad APA

Lutz, R. R. (1949). Graphic presentation simplified. Funk & Wagnalls.

Dyfyniad Arddull Chicago

Lutz, Rufus Rolla. Graphic Presentation Simplified. New York: Funk & Wagnalls, 1949.

Dyfyniad MLA

Lutz, Rufus Rolla. Graphic Presentation Simplified. Funk & Wagnalls, 1949.

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