Murdoch, John, author
Spon Press, 2000
Buku Teks
Levy, Sidney M., author
McGraw-Hill , 2002
Buku Teks
Wass, Alonzo
Englewood Cliffs, NJ: Prentice-Hall, 1972
Buku Teks
Ritz, George J., author
McGraw-Hill, 1994
Buku Teks
Singh, Harpal, author
Tata McGraw-Hill, 1986
Buku Teks