Cox, Arthur F.
Harcourt Brace Javanovich, 1978
Buku Teks
Finney, Ross L.
Addison-Wesley, 1994
Buku Teks
Stewart, James, 1941-
Brooks/Cole, 1999
Buku Teks
Kramer, Arthur D.
McGraw-Hill, 1984
Buku Teks
Washington, Allyn J.
Pearson - Prentice Hall, 2009
Buku Teks SO