Interregional Seminar on Development Planning (1st : Ankara : 1965) & United Nations. (1967). Planning the external sector: Techniques, problems and policies. United Nations.
Chicago-referens (17:e uppl.)Interregional Seminar on Development Planning (1st : Ankara : 1965) och United Nations. Planning the External Sector: Techniques, Problems and Policies. New York: United Nations, 1967.
MLA-referens (9:e uppl.)Interregional Seminar on Development Planning (1st : Ankara : 1965) och United Nations. Planning the External Sector: Techniques, Problems and Policies. United Nations, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.