Hammond, L. (1997). How to draw portraits in colored pencil from photographs. North Light.
Citace podle Chicago (17th ed.)Hammond, Lee. How to Draw Portraits in Colored Pencil from Photographs. Cincinnati: North Light, 1997.
Citace podle MLA (9th ed.)Hammond, Lee. How to Draw Portraits in Colored Pencil from Photographs. North Light, 1997.
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