APA (7th ed.) Citation

Mannheim, H., & Spencer, J. C. (1949). Problems of classification in the English penal and reformatory system. I.S.T.D.

Chicago Style (17th ed.) Citation

Mannheim, Hermann, and John Carrington Spencer. Problems of Classification in the English Penal and Reformatory System. London: I.S.T.D, 1949.

MLA (9th ed.) Citation

Mannheim, Hermann, and John Carrington Spencer. Problems of Classification in the English Penal and Reformatory System. I.S.T.D, 1949.