Cita APA

Palmer, N. D., & Perkins, H. C. (1965). Internarional relations (2nd.). Scientific Book.

Citación estilo Chicago

Palmer, Norman D., y Howard C. Perkins. Internarional Relations. 2nd. Calcutta: Scientific Book, 1965.

Cita MLA

Palmer, Norman D., y Howard C. Perkins. Internarional Relations. 2nd. Scientific Book, 1965.