APA (7th ed.) Citation

Gardner, T., & Summerer, E. (2019). The Backpack (1st edition.). Ascent Audio.

Chicago Style (17th ed.) Citation

Gardner, Tim, and Eric Summerer. The Backpack. 1st edition. [Erscheinungsort nicht ermittelbar]: Ascent Audio, 2019.

MLA (9th ed.) Citation

Gardner, Tim, and Eric Summerer. The Backpack. 1st edition. Ascent Audio, 2019.