Croft, Anthony, author
Buku Teks
Glyn James
Pearson Prentice Hall, 2008
Buku Teks
Srivastava, R.S.L., author
Tata McGraw-Hill, 1980
Buku Teks
Srivastava, R.S.L., author
Tata McGraw-Hill, 1982
Buku Teks
Bajpai, A.C., author
John Wiley & Sons, 1980
Buku Teks