APA (7th ed.) Citation

PETRIE, F., & SHAW, J. (1990). The big book of painting nature in watercolor. Watson - Guptill.

Chicago Style (17th ed.) Citation

PETRIE, Ferdinand, and John SHAW. The Big Book of Painting Nature in Watercolor. Watson - Guptill, 1990.

MLA (8th ed.) Citation

PETRIE, Ferdinand, and John SHAW. The Big Book of Painting Nature in Watercolor. Watson - Guptill, 1990.

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