United nations. Commission on International Trade Law. (1968). Yearbook. v. 1-. s.n.
Cita Chicago (17th ed.)United nations. Commission on International Trade Law. Yearbook. V. 1-. New York: s.n, 1968.
Cita MLA (9th ed.)United nations. Commission on International Trade Law. Yearbook. V. 1-. s.n, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.