edited by Richard Tardanico
Sage, 1987
Buku Teks
Sage Publications, 1987
Buku Teks
edited by Sergio Diaz-Brizuets and Sidney Weintraub
Westview Press , 1991
Buku Teks
Wiarda, Howard J., author
Westview Press, 1992
Buku Teks
Hanke, Lewis
D. Van Nostrand Company, 1959
Buku Teks