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.
Цитирование в стиле Чикаго (17-е изд.)United Nations. Technical Assistance Administration и Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. New York, 1954.
Цитирование MLA (9-е изд.)United Nations. Technical Assistance Administration и Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. 1954.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.