Dyfyniad APA

Hartwigsen, G. L. (1980). Design concepts: A basic guidebook. Allyn and Bacon.

Dyfyniad Arddull Chicago

Hartwigsen, Gail Lynn. Design Concepts: A Basic Guidebook. Boston: Allyn and Bacon, 1980.

Dyfyniad MLA

Hartwigsen, Gail Lynn. Design Concepts: A Basic Guidebook. Allyn and Bacon, 1980.

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