Ratnakar, Pramesh
Tiger Books International , 1996
Buku Teks
Kingsland, Venika Mehra, author
Global Books , 1997
Buku Teks
Klostermaier, Klaus K.
Oneworld , s.a
Buku Teks
BlackWell Publishing, 2003
Buku Teks
Herman, A. L., author
Westview Press, 1991
Buku Referensi