APA (7th ed.) Citation

Farley, R., Ivanov, A., & Ivanov, O. (2012). Mia and the big sister ballet. Harper.

Chicago Style (17th ed.) Citation

Farley, Robin, A. Ivanov, and O. Ivanov. Mia and the Big Sister Ballet. New York: Harper, 2012.

MLA (8th ed.) Citation

Farley, Robin, et al. Mia and the Big Sister Ballet. Harper, 2012.