Cita APA (7th ed.)

Ritchie, M., & Mack, J. A. (1974). Police warnings. University of Glasgow.

Cita Chicago (17th ed.)

Ritchie, Margaret, i John A. Mack. Police Warnings. Glasgow: University of Glasgow, 1974.

Cita MLA (8th ed.)

Ritchie, Margaret, i John A. Mack. Police Warnings. University of Glasgow, 1974.