APA (7th ed.) Citation

Petrie, F., & Shaw, J. (1990). The big book of painting nature in watercolor. Watson-Guptill Publications.

Chicago Style (17th ed.) Citation

Petrie, Ferdinand, and John Shaw. The Big Book of Painting Nature in Watercolor. New York: Watson-Guptill Publications, 1990.

MLA (9th ed.) Citation

Petrie, Ferdinand, and John Shaw. The Big Book of Painting Nature in Watercolor. Watson-Guptill Publications, 1990.