Pike, Fredrick B.
University of Notre Dame Press, 1963
Buku Teks
edited by Edward Friedman & Mark Selden
Vintage Books, 1971
Buku Teks
Talbot, Phillips, author
Harper and Brothers, 1958
Buku Teks
Hanke, Lewis
D. Van Nostrand Company, 1959
Buku Teks
Blum, Robert
McGraw-Hill, 1966
Buku Teks