APA (7 ম সংস্করণ) উদ্ধৃতি

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.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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