Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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