APA (7th ed.) Citation

Rick Riordan. (2011). The 39 Clues: Vespers Rising- Book 11. Scholastic.

Chicago Style (17th ed.) Citation

Rick Riordan. The 39 Clues: Vespers Rising- Book 11. London: Scholastic, 2011.

MLA (9th ed.) Citation

Rick Riordan. The 39 Clues: Vespers Rising- Book 11. Scholastic, 2011.