APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

United Nations. Technical Assistance Administration en Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. New York, 1954.

MLA (9e ed.) Bronvermelding

United Nations. Technical Assistance Administration en Ricardo M. Ortiz. The Harbor System of El Salvador: Prepared for the Government of El Salvador by Ricardo M. Ortiz. 1954.