Company, Panama Canal (1963). The Panama Canal review. Panama Canal Co. p. 103. Retrieved December 30, 2017. {{cite book}}: |last= has generic name (help)
Treaty concerning the permanent neutrality and operation of the Panama Canal, with annexes and protocol. Signed at Washington September 7, 1977. Entered into force October 1, 1979, subject to amendments, conditions, reservations, and understandings. 33 UST 1; TIAS 10029Archived April 3, 2016, at the Wayback Machine; 1161 UNTS 177.
Conn, Stetson; Engelman, Rose C.; Fairchild, Byron (1964). The Western Hemisphere—Guarding The United States And Its Outposts. United States Army In World War II. Washington, DC: Center Of Military History, United States Army. p. 312. LCCN62060067.
Treaty concerning the permanent neutrality and operation of the Panama Canal, with annexes and protocol. Signed at Washington September 7, 1977. Entered into force October 1, 1979, subject to amendments, conditions, reservations, and understandings. 33 UST 1; TIAS 10029Archived April 3, 2016, at the Wayback Machine; 1161 UNTS 177.