Cita APA

Zartman, W. I., & Zartman, W. I. (1987). Positive sum: Improving North-South negociations. New Brunswick: Transaction Books.

Citación estilo Chicago

Zartman, William I., y William I. Zartman. Positive Sum: Improving North-South Negociations. New Brunswick: Transaction Books, 1987.

Cita MLA

Zartman, William I., y William I. Zartman. Positive Sum: Improving North-South Negociations. New Brunswick: Transaction Books, 1987.