Gopal, Sarvepalli
Jawaharlal Nehru: a biography / Sarvepalli Gopal
Oxford University Press , 1984
 Buku Teks SO
Gopal, Sarvepalli
Jawaharlal Nehru: a biography Vol. one 1889-1947 / Sarvepalli Gopal
Oxford University Press, 1979
 Buku Teks SO
Craven, Paul R.
Biography
Dickenson Publishing, 1968
 Buku Teks SO
Gopalan, K. Gopal
Introduction to digital electronic circuits / K. "Gopal" Gopalan
IRWIN, 1996
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Nagrath, I.J.
Control systems engineering / I.J. Nagrath, M. Gopal
Wiley Eastern Limited, 1978
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