Mellersh, H.E.L., author
Simon & Schuster, 1994
Buku Referensi
Vasey, Daniel E., author
Iowa State University Press, 1992
Buku Teks
Salmon, Edward T., author
Routledge, 1995
Buku Teks
Williams, Neville, author
Penguin Books, 1975
Buku Teks
Hornblower, Simon, author
Routledge, Taylor & Francis Group, 2002
Buku Teks