Gopal, Sarvepalli, author
Oxford University Press, 1992
Buku Teks
Gopal, Sarvepalli, author
Oxford University Press , 1984
Buku Teks
Gopal, Sarvepalli, author
Oxford University Press, 1979
Buku Teks
Craven, Paul R., author
Dickenson Publishing, 1968
Buku Teks
Gopalan, K. Gopal
IRWIN, 1996
Buku Teks