APA (7th ed.) Citation

Joosse, B. M., & Whyte, M. (1996). I love you the purplest. Chronicle Books.

Chicago Style (17th ed.) Citation

Joosse, Barbara M., and Mary Whyte. I Love You the Purplest. San Francisco, Calif: Chronicle Books, 1996.

MLA (8th ed.) Citation

Joosse, Barbara M., and Mary Whyte. I Love You the Purplest. Chronicle Books, 1996.