JTart Publishing & Media, 2012
Buku Referensi
Alexander, Christopher, author
Oxford University Press, 1977
Buku Referensi
Academy Editions, 1993
Buku Teks
Stein, Benjamin, author
John Wiley & Sons. Inc., 2000
Buku Teks
McGuinness, William J., author
John Wiley & Sons, 1980
Buku Teks