Smagula, H. J. (2002). Creative drawing (2nd ed.). Laurence King.
Cita Chicago (17th ed.)Smagula, Howard J. Creative Drawing. 2nd ed. London: Laurence King, 2002.
Cita MLA (9th ed.)Smagula, Howard J. Creative Drawing. 2nd ed. Laurence King, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.