Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East, Varna, Bulgaria, & United Nations Industrial Development Organization. (1972). Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East. United Nations.
Cita Chicago Style (17a ed.)Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East, Varna, Bulgaria, y United Nations Industrial Development Organization. Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East. New York: United Nations, 1972.
Cita MLA (8a ed.)Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East, Varna, Bulgaria, y United Nations Industrial Development Organization. Regional Seminar on Machine Tools in Developing Countries of Europe and the Middle East. United Nations, 1972.