United Nations. Technical Assistance Administration & Ortiz, R. M. (1954). The harbor system of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz.
Citação norma ChicagoUnited Nations. Technical Assistance Administration and Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. New York, 1954.
Citação norma MLAUnited Nations. Technical Assistance Administration and Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. 1954.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.