Routledge, 2004
Buku Teks
Gardner, Philip
Routledge, 2010
Buku Teks
Malchow, Howard L.
Bloomsbury Academic, an imprint of Bloomsbury Pub, 2016
Buku Teks
Elton, Geoffrey Rudolph
Sydney University Press, 1967
Buku Teks
Renier, G.J.
Harper and Row, 1965
Buku Teks