Brown, Seyom, author
Columbia University Press, 1968
Buku Teks
Brown, Seyom, author
Columbia University Press, 1983
Buku Teks
Randall, Clarence B., author
University of Chicago Press, 1954
Buku Teks
Mangone, Gerard J., author
Syracuse University Press, 1962
Buku Teks
Rosati, Jerel A., 1953-, author
Wadsworth, 2007
Buku Teks