APA (7th ed.) Citation

Gardiner, J. A. (1969). Traffic and the Police: Variations in Law-Enforcement Policy. Harvard University Press. https://doi.org/10.4159/harvard.9780674491618

Chicago Style (17th ed.) Citation

Gardiner, John A. Traffic and the Police: Variations in Law-Enforcement Policy. Cambridge, Mass: Harvard University Press, 1969. https://doi.org/10.4159/harvard.9780674491618.

MLA (9th ed.) Citation

Gardiner, John A. Traffic and the Police: Variations in Law-Enforcement Policy. Harvard University Press, 1969. https://doi.org/10.4159/harvard.9780674491618.