(1999). Color Harmony Workbook: A Workbook and Guide to Creative Color Combinations. Rockport Publ..
Chicago-Zitierstil (17. Ausg.)Color Harmony Workbook: A Workbook and Guide to Creative Color Combinations. Gloucester/Mass.: Rockport Publ., 1999.
MLA-Zitierstil (8. Ausg.)Color Harmony Workbook: A Workbook and Guide to Creative Color Combinations. Rockport Publ., 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.