APA

Abbott T., Jessell T. & Merrell D. (2008). The Tower of the Elf King. New York: Scholastic.

Chicago

Abbott Tony, Jessell Tim and Merrell David. 2008. The Tower of the Elf King. New York: Scholastic.

Harvard

Abbott T., Jessell T. and Merrell D. (2008). The Tower of the Elf King. New York: Scholastic.

MLA

Abbott Tony, Jessell Tim and Merrell David. The Tower of the Elf King. New York: Scholastic. 2008.