Wilkinson, L. (2005). The grammar of graphics (2a. ed.). Springer Science Business Media.
Cita Chicago (17th ed.)Wilkinson, Leland. The Grammar of Graphics. 2a. ed. Nueva York: Springer Science Business Media, 2005.
Cita MLA (9th ed.)Wilkinson, Leland. The Grammar of Graphics. 2a. ed. Springer Science Business Media, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.