Seeley, Christopher
University of Hawai Press, 2000
Buku Teks
Bagnall, Roger S.,
Routledge, 1995
Buku Teks
Young, Robert
Routledge, 1990
Buku Teks
Schoch, Richard W., author
Cambridge University Press , 2016
Buku Teks
Krooss, Herman Edward, 1912-1975, author
Prentice-Hall, 1972
Buku Teks