APA (7th ed.) Citation

Perlman, R., & Santat, D. (2007). Otto undercover #6: Brain freeze. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Perlman, Rhea, and Dan Santat. Otto Undercover #6: Brain Freeze. NY: HarperCollins Publishers, 2007.

MLA (9th ed.) Citation

Perlman, Rhea, and Dan Santat. Otto Undercover #6: Brain Freeze. HarperCollins Publishers, 2007.

Warning: These citations may not always be 100% accurate.