APA (7th ed.) Citation

Frankel, E., & Heaphy, P. (2012). Tough! Free Spirit Publishing.

Chicago Style (17th ed.) Citation

Frankel, Erin, and Paula Heaphy. Tough! Minneapolis, MN: Free Spirit Publishing, 2012.

MLA (9th ed.) Citation

Frankel, Erin, and Paula Heaphy. Tough! Free Spirit Publishing, 2012.