Brown, Byron Wm
John Wiley & Sons, 1977
Buku Teks
Lancaster, H.O.
John Wiley & Sons, 1974
Buku Teks
Schork, M. Anthony
Prentice-Hall, 2000
Buku Teks
Murphy, Edmond A.
John Hopkins University Press, 1982
Buku Teks
Samuel, Myra L.
Pearson - Prentice Hall, 2003
Buku Teks