United Nations. (1957). The United Nations seminar on industrial statistics, 6-31 May 1957, Athens, Greece. s.n.
Citazione stile Chigago Style (17a edizione)United Nations. The United Nations Seminar on Industrial Statistics, 6-31 May 1957, Athens, Greece. [New York: s.n, 1957.
Citatione MLA (9a ed.)United Nations. The United Nations Seminar on Industrial Statistics, 6-31 May 1957, Athens, Greece. s.n, 1957.
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