Willoughby, W. F. (1977). Territories and dependencies of the United States, their Government and administration [microform]. University of the Philippines Library.
Cita Chicago (17th ed.)Willoughby, William Franklin. Territories and Dependencies of the United States, Their Government and Administration [microform]. Quezon City: University of the Philippines Library, 1977.
Cita MLA (9th ed.)Willoughby, William Franklin. Territories and Dependencies of the United States, Their Government and Administration [microform]. University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.