South, Stanley
Academic Press, 1977
Buku Teks
New York Academic Press 1977
Buku Teks
Butzer, Karl W., author
Cambridge University Press, 1982
Buku Teks
edited, Charles E. Orser
Routledge, 2002
Buku Referensi
Southworth, Franklin C., author
Routledge, 2005
Buku Teks