APA (7th ed.) Citation

Leonard, J. D., & Telford, H. D. (1940). Police Instruction (A Measurement of Its Effectiveness). https://doi.org/10.2307/1136942

Chicago Style (17th ed.) Citation

Leonard, John D., and H. D. Telford. Police Instruction (A Measurement of Its Effectiveness). 1940. https://doi.org/10.2307/1136942.

MLA (9th ed.) Citation

Leonard, John D., and H. D. Telford. Police Instruction (A Measurement of Its Effectiveness). 1940. https://doi.org/10.2307/1136942.

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