Relethford, John., author
McGraw-Hill Humanities, 2013
Buku Teks
Shattuck, John H. F., author
Harvard University Press, 2003
Buku Teks
Delaet, Debra L., 1968-, author
Cengage Learning, 2015
Buku Teks
edited by Herbert Morris
Stanford University Press, 1961
Buku Teks
Young, Clarence W., author
Harper & Brothers, 1956
Buku Teks