Interregional Seminar on Development Planning (1st : Ankara : 1965) & United Nations. (1967). Planning the external sector: Techniques, problems and policies. United Nations.
Cita Chicago (17th ed.)Interregional Seminar on Development Planning (1st : Ankara : 1965) i United Nations. Planning the External Sector: Techniques, Problems and Policies. New York: United Nations, 1967.
Cita MLA (9th ed.)Interregional Seminar on Development Planning (1st : Ankara : 1965) i United Nations. Planning the External Sector: Techniques, Problems and Policies. United Nations, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.