Finkle, Jason L.
John Wiley & Sons, 1966
Buku Teks
Tan, Gerald
Times Academic Press, 2000
Buku Teks
McMichael, Philip, 1947-
Pine Forge Press, 2000
Buku Teks SO
McMichael, Philip, 1947-
Sage, 2012
Buku Teks SO
Andrain, Charles F.
Macmillan, 1995
Buku Teks