Robertson, S., & Bertling, T. How to draw: Drawing and sketching objects and environments from your imagination.
Cita Chicago (17th ed.)Robertson, Scott, i Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.
Cita MLA (8th ed.)Robertson, Scott, i Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.
Atenció: Aquestes cites poden no estar 100% correctes.