Rankin David. (2000). Fast Sketching Techniques: Capture the Fundamental Essence of Elusive Subjects. North Light Books.
Chicago-referens (17:e uppl.)Rankin David. Fast Sketching Techniques: Capture the Fundamental Essence of Elusive Subjects. Cincinnati: North Light Books, 2000.
MLA-referens (9:e uppl.)Rankin David. Fast Sketching Techniques: Capture the Fundamental Essence of Elusive Subjects. North Light Books, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.