APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.