APA (7th ed.) Citation

Densley, J., Densley, J. A., & Hamill, H. (2011). Under the hood: The mechanics of London's street gangs.

Chicago Style (17th ed.) Citation

Densley, J., James Andrew Densley, and H. Hamill. Under the Hood: The Mechanics of London's Street Gangs. 2011.

MLA (9th ed.) Citation

Densley, J., et al. Under the Hood: The Mechanics of London's Street Gangs. 2011.