APA (7th ed.) Citation

Suzanne Collins & Paul Boehmer. (2008). Gregor and the Marks of Secret. Books on Tape.

Chicago Style (17th ed.) Citation

Suzanne Collins and Paul Boehmer. Gregor and the Marks of Secret. Books on Tape, 2008.

MLA (8th ed.) Citation

Suzanne Collins and Paul Boehmer. Gregor and the Marks of Secret. Books on Tape, 2008.

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