APA (7th ed.) Citation

(2001). Color harmony workbook: A workbook and guide to creative color combinations (3. ed.). Olms.

Chicago Style (17th ed.) Citation

Color Harmony Workbook: A Workbook and Guide to Creative Color Combinations. 3. ed. Zürich: Olms, 2001.

MLA (9th ed.) Citation

Color Harmony Workbook: A Workbook and Guide to Creative Color Combinations. 3. ed. Olms, 2001.

Warning: These citations may not always be 100% accurate.