Damis, John
Hoover Institution Press, 1983
Buku Teks
Meny, Yves
Oxford University Press, 1998
Buku Teks
Biskup, Peter
University of Queensland Press; Crane, Russak & Company, Inc.,, 1973
Buku Teks
Harrison, John B.
Alfred A. Knopf , 1966
Buku Teks
Harrison, John B.
Alfred A. Knopf, 1969
Buku Teks