APA (7th ed.) Citation

Kirk, R., & Kirk, L. (1973). Desert: The American Southwest. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Kirk, Ruth, and Louis Kirk. Desert: The American Southwest. Boston: Houghton Mifflin, 1973.

MLA (9th ed.) Citation

Kirk, Ruth, and Louis Kirk. Desert: The American Southwest. Houghton Mifflin, 1973.