Cita APA (7a ed.)

Johnsen, S., & Fitzpatrick, S. (2007). The impact of enforcement on street users in England. Policy Press.

Cita Chicago Style (17a ed.)

Johnsen, Sarah, y Suzanne Fitzpatrick. The Impact of Enforcement on Street Users in England. Bristol: Policy Press, 2007.

Cita MLA (9a ed.)

Johnsen, Sarah, y Suzanne Fitzpatrick. The Impact of Enforcement on Street Users in England. Policy Press, 2007.