Shipley, Graham, author
Routledge, Taylor & Francis Group, 2008
Buku Teks
Hornblower, Simon, author
Routledge, Taylor & Francis Group, 2002
Buku Teks
Hazel, John, author
Routledge, 2000
Buku Teks
Hazel, John, author
Routledge, 2000
Buku Referensi
Hardy, W.G.
Schenkman Publishing Company Inc., 1962.
Buku Teks