Cita APA (7a ed.)

Eissen, K., & Steur, R. (2012). Sketching: The basics (3rd. printing.). BISPublishers.

Cita Chicago Style (17a ed.)

Eissen, Koos, y Roselien Steur. Sketching: The Basics. 3rd. printing. Amsterdam: BISPublishers, 2012.

Cita MLA (9a ed.)

Eissen, Koos, y Roselien Steur. Sketching: The Basics. 3rd. printing. BISPublishers, 2012.