APA (7e ed.) Bronvermelding

Powell, W. F. (2006). Color mixing recipes for portraits: Featuring oil and acrylic-- plus a special section for watercolor. Walter Foster Pub..

Chicago (17e ed.) Bronvermelding

Powell, William F. Color Mixing Recipes for Portraits: Featuring Oil and Acrylic-- Plus a Special Section for Watercolor. Laguna Hills, CA: Walter Foster Pub., 2006.

MLA (9e ed.) Bronvermelding

Powell, William F. Color Mixing Recipes for Portraits: Featuring Oil and Acrylic-- Plus a Special Section for Watercolor. Walter Foster Pub., 2006.