Seminar for Student Leaders Tagaytay City. (1971). The complexities of change. Cultural Affairs Office, U.S. Embassy.
Cita Chicago (17th ed.)Seminar for Student Leaders Tagaytay City. The Complexities of Change. [Manila: Cultural Affairs Office, U.S. Embassy, 1971.
Cita MLA (9th ed.)Seminar for Student Leaders Tagaytay City. The Complexities of Change. Cultural Affairs Office, U.S. Embassy, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.