Shaffer, P. Painting with Four Tubes of Paint. A Simplified Palette for Watercolorists. New York: Watson-Guptill, 1990 144 p. : ill. 0-8230-3889-0.
Shaffer, P. Painting with Four Tubes of Paint. A Simplified Palette for Watercolorists. New York: Watson-Guptill, 1990 144 p. : ill. 0-8230-3889-0.
Shaffer, P. (1990) Painting with Four Tubes of Paint. A Simplified Palette for Watercolorists, New York: Watson-Guptill 144 p. : ill. 0-8230-3889-0.
Shaffer, P. (1990). Painting with Four Tubes of Paint. A Simplified Palette for Watercolorists. Monogr.. New York: Watson-Guptill, 144 p. : ill.
Shaffer P. Painting with Four Tubes of Paint. A Simplified Palette for Watercolorists: Monogr.. New York: Watson-Guptill; 1990. p. 144 p. : ill. ISBN: 0-8230-3889-0.
