Crisp, L. F. (Leslie Finlay)
Yale University Press, 1949
Buku Teks
Laski, Harold J.
George Allen and Unwin, 1952
Buku Teks
Dodd, Lawrence C., 1946-
Princenton University Press, 1976
Buku Teks
Bailey, Sydney D.
Institute of pacific relations, 1953
Buku Teks
Buck, A.E.
Public Administration Service, 1949
Buku Teks