APA (7th ed.) Citation

Eissen, K., & Steur, R. Sketching: Drawing techniques for product designers.

Chicago Style (17th ed.) Citation

Eissen, Koos, and Roselien Steur. Sketching: Drawing Techniques for Product Designers.

MLA (8th ed.) Citation

Eissen, Koos, and Roselien Steur. Sketching: Drawing Techniques for Product Designers.

Warning: These citations may not always be 100% accurate.