APA (7th ed.) Citation

Cowart, J., O'Keeffe, G., & Hamilton, J. (1987). Georgia O'Keeffe : art and letters: Art and letters. Bulfinch Press.

Chicago Style (17th ed.) Citation

Cowart, Jack, Georgia O'Keeffe, and Juan Hamilton. Georgia O'Keeffe : Art and Letters: Art and Letters. Boston, Mass.: Bulfinch Press, 1987.

MLA (9th ed.) Citation

Cowart, Jack, et al. Georgia O'Keeffe : Art and Letters: Art and Letters. Bulfinch Press, 1987.

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