Valli, M., & Ibarra, A. Walk the line: The art of drawing.
Cita Chicago (17th ed.)Valli, Marc, i Ana Ibarra. Walk the Line: The Art of Drawing.
Cita MLA (8th ed.)Valli, Marc, i Ana Ibarra. Walk the Line: The Art of Drawing.
Atenció: Aquestes cites poden no estar 100% correctes.