APA (7th ed.) Citation

Klein, N., & Porter, P. G. (1975). Blue trees, red sky. Pantheon Books.

Chicago Style (17th ed.) Citation

Klein, Norma, and Pat Grant Porter. Blue Trees, Red Sky. New York: Pantheon Books, 1975.

MLA (9th ed.) Citation

Klein, Norma, and Pat Grant Porter. Blue Trees, Red Sky. Pantheon Books, 1975.