APA (7th ed.) Citation

Black, M. I., & Ohi, D. R. (2018). I'm sad. Abrams Books for Young Readers.

Chicago Style (17th ed.) Citation

Black, Michael Ian, and Debbie Ridpath Ohi. I'm Sad. New York: Abrams Books for Young Readers, 2018.

MLA (9th ed.) Citation

Black, Michael Ian, and Debbie Ridpath Ohi. I'm Sad. Abrams Books for Young Readers, 2018.