APA (7th ed.) Citation

Eckstein, H. W. (1991). Color in the 21st century: A practical guide for graphic designers, photographers, printers, separators, and anyone involved in color printing. Watson-Guptill Publications.

Chicago Style (17th ed.) Citation

Eckstein, Helene W. Color in the 21st Century: A Practical Guide for Graphic Designers, Photographers, Printers, Separators, and Anyone Involved in Color Printing. New York: Watson-Guptill Publications, 1991.

MLA (8th ed.) Citation

Eckstein, Helene W. Color in the 21st Century: A Practical Guide for Graphic Designers, Photographers, Printers, Separators, and Anyone Involved in Color Printing. Watson-Guptill Publications, 1991.

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