Perfecto, I. T. (1983). Foreign policy digest, 1972-1983. Foreign Service Institute.
Cita Chicago (17th ed.)Perfecto, Isidoro T. Foreign Policy Digest, 1972-1983. [Manila]: Foreign Service Institute, 1983.
Cita MLA (9th ed.)Perfecto, Isidoro T. Foreign Policy Digest, 1972-1983. Foreign Service Institute, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.