APA (7th ed.) Citation

Alex, N. (1969). Black in blue: A study of the Negro policeman. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Alex, Nicholas. Black in Blue: A Study of the Negro Policeman. New York: Appleton-Century-Crofts, 1969.

MLA (9th ed.) Citation

Alex, Nicholas. Black in Blue: A Study of the Negro Policeman. Appleton-Century-Crofts, 1969.

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