Goldhaber, Stanley, author
John Wiley & Sons, 1977
Buku Teks
Schroeder, W. L., author
John Wiley & Sons, 1984
Buku Teks
Lewis, J. R.
Macmillan, 1976
Buku Teks
Macedo, Manuel C., author
John Wiley & Sons, 1978
Buku Teks
Schexnayder, Clifford J., author
McGraw-Hill, 2004
Buku Teks