Steiner, Frederick R., author
John Wiley & Sons, 2006
Buku Referensi
Punter, John, author
UBC Press, 2003
Buku Teks
Gallion, Arthur B., author
D. Van Nostrand, 1963
Buku Teks
Gallion, Arthur B., author
D. Van Nostrand, 1975
Buku Teks
Parfect, Michael, author
Routledge, 1997
Buku Teks