APA (7th ed.) Citation

Thielbar, M., & Pantoja, T. (2010). The lost key: A mystery with whole numbers. Graphic Universe.

Chicago Style (17th ed.) Citation

Thielbar, Melinda, and Tintin Pantoja. The Lost Key: A Mystery with Whole Numbers. Minneapolis [Minn.]: Graphic Universe, 2010.

MLA (8th ed.) Citation

Thielbar, Melinda, and Tintin Pantoja. The Lost Key: A Mystery with Whole Numbers. Graphic Universe, 2010.

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