Wilson, Charles E.
Prentice-Hall, 1997
Buku Teks
Spotts, Merhyle Franklin
Prentice-Hall, 1985
Buku Teks
Jain, Rajendra K.
Khanna Publishers, 1983
Buku Teks
Bhandari, V. B.
Tata McGraw-Hill, 2010
Buku Teks
Khurmi, R. S.
Eurasia Publishing House, 1980
Buku Teks