Grogono, Peter
Addison-Wesley, 1982
Buku Teks
Bennet, William Ralph
Prentice-Hall, 1976
Buku Teks
Etter, Delores Maria, 1947-
Benjamin/Cummings, 1984
Buku Teks
Pearl, Judea
Addison-Wesley Publishing Comp., 1984
Buku Teks
Snover, Stephen L.
Prentice-Hall, 1982
Buku Teks