Charles Wallschlaeger and Cynthia Busic-Snyder.
  <i><b>Basic Visual Concepts and Principles for Artists,
  Architects and Designers</b></i>.
  McGraw Hill, 1992.
  <A HREF="http://vis.cs.brown.edu/docs/pdf/bib/g/Wallschlaeger-1992-BVC.pdf.html">(pdf)</A>
  <A HREF="http://vis.cs.brown.edu/results/bibtex/Wallschlaeger-1992-BVC.bib">(bibtex: Wallschlaeger-1992-BVC)</A>.<br />