Cita APA (7th ed.)
Eissen, K., & Steur, R. Sketching: Drawing Techniques for Product Designers (Edición rústica.). BIS Publishers.
Cita Chicago (17th ed.)
Eissen, Koos, i Roselien Steur. Sketching: Drawing Techniques for Product Designers. Edición rústica. Amsterdam, Holanda: BIS Publishers.
Cita MLA (9th ed.)
Eissen, Koos, i Roselien Steur. Sketching: Drawing Techniques for Product Designers. Edición rústica. BIS Publishers.
Atenció: Aquestes cites poden no estar 100% correctes.