Cita APA (7a ed.)
Richmond, L., & Littlejohns, J. The Technique of Pastel Painting. Pitman.
Cita estilo Chicago (17a ed.)
Richmond, Leonard, y J. Littlejohns. The Technique of Pastel Painting. Nueva York, EUA: Pitman.
Cita MLA (9a ed.)
Richmond, Leonard, y J. Littlejohns. The Technique of Pastel Painting. Pitman.
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