Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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