Cita APA (7a ed.)

Norling, E. R. (1939). Perspective made easy: A step-by-step method for learning the basis of drawing. The MacMillan co..

Cita Chicago Style (17a ed.)

Norling, Ernest R. Perspective Made Easy: A Step-by-step Method for Learning the Basis of Drawing. New York: The MacMillan co., 1939.

Cita MLA (9a ed.)

Norling, Ernest R. Perspective Made Easy: A Step-by-step Method for Learning the Basis of Drawing. The MacMillan co., 1939.