Cita APA (7a ed.)
Foster, W. Drawing Simplified: In Pen, Pencil, Brush, Charcoal.
Cita estilo Chicago (17a ed.)
Foster, Walter. Drawing Simplified: In Pen, Pencil, Brush, Charcoal.
Cita MLA (9a ed.)
Foster, Walter. Drawing Simplified: In Pen, Pencil, Brush, Charcoal.
Precaución: Estas citas no son 100% exactas.