APA (7th ed.) Citation

Duffy, J. (1962). Portugal's African territories: Present realities. s.n.

Chicago Style (17th ed.) Citation

Duffy, James. Portugal's African Territories: Present Realities. New York: s.n, 1962.

MLA (9th ed.) Citation

Duffy, James. Portugal's African Territories: Present Realities. s.n, 1962.