APA (7th ed.) Citation

Peterson, E. (2019). It's a round, round world! StarBerry Books.

Chicago Style (17th ed.) Citation

Peterson, Elly. It's a Round, Round World! New York: StarBerry Books, 2019.

MLA (9th ed.) Citation

Peterson, Elly. It's a Round, Round World! StarBerry Books, 2019.