APA (7th ed.) Citation

Barrett, M., Leven, R., Campbell, D., & Fry, H. (2017). City in the sky. [publisher not identified].

Chicago Style (17th ed.) Citation

Barrett, Matthew, Russell Leven, Dallas Campbell, and Hannah Fry. City in the Sky. [Place of publication not identified]: [publisher not identified], 2017.

MLA (8th ed.) Citation

Barrett, Matthew, et al. City in the Sky. [publisher not identified], 2017.

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