APA (7th ed.) Citation

Purcell, W. E. (1974). British police in a changing society / by William Purcell. Mowbrays.

Chicago Style (17th ed.) Citation

Purcell, William Ernest. British Police in a Changing Society / by William Purcell. London: Mowbrays, 1974.

MLA (9th ed.) Citation

Purcell, William Ernest. British Police in a Changing Society / by William Purcell. Mowbrays, 1974.

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