Smith, Stephen W.
John Wiley & Sons, 1997
Buku Teks
Leliavsky, Serge
New Delhi: Oxford and IBH, 1965
Buku Teks
Mazumder, S.K.
McGraw-Hill Publishing Company, 1983
Buku Teks
Hansen, Vaughn E.
John Wiley & Sons, 1980
Buku Teks
Sharma, S.K.
S. Chand & Company (Pvt) LTD, 1988
Buku Teks