APA (7th ed.) Citation

Olsen, E., Arnett, R., & Valdez, M. (2022). Hattie Harmony: Worry detective. Viking.

Chicago Style (17th ed.) Citation

Olsen, Elizabeth, Robert Arnett, and Marissa Valdez. Hattie Harmony: Worry Detective. New York: Viking, 2022.

MLA (8th ed.) Citation

Olsen, Elizabeth, et al. Hattie Harmony: Worry Detective. Viking, 2022.