Cita APA (7th ed.)

Lewis, D. (1983). Watercolor painting techniques. Watson-Guptill Publications.

Cita Chicago (17th ed.)

Lewis, David. Watercolor Painting Techniques. New York: Watson-Guptill Publications, 1983.

Cita MLA (9th ed.)

Lewis, David. Watercolor Painting Techniques. Watson-Guptill Publications, 1983.