Cita APA (7th ed.)
Hartman, F. H. (1973). The relations of nation (4th ed.). Macmillan Company.
Cita Chicago (17th ed.)
Hartman, Frederick H. The Relations of Nation. 4th ed. New York: Macmillan Company, 1973.
Cita MLA (9th ed.)
Hartman, Frederick H. The Relations of Nation. 4th ed. Macmillan Company, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.