Bull, Hedley, author
Macmillan, 1995
Buku Teks
Gorki, Maxim, author
T. Werner Laurie, [Date of publication not identified]
Buku Teks
Tambiah, S.J.
Cambridge University Press, 1976
Buku Teks
Young, Clarence W., author
Harper & Brothers, 1956
Buku Teks
Muzos, Steven J.
Harper Collins College, 1992
Buku Teks