APA (7e ed.) Bronvermelding

Richards, J. (2013). Freehand drawing and discovery: Urban sketching and concept drawing for designers. Wiley.

Chicago (17e ed.) Bronvermelding

Richards, James. Freehand Drawing and Discovery: Urban Sketching and Concept Drawing for Designers. Hoboken, New Jersey: Wiley, 2013.

MLA (8e ed.) Bronvermelding

Richards, James. Freehand Drawing and Discovery: Urban Sketching and Concept Drawing for Designers. Wiley, 2013.