Kay, Brian R.
McGraw-Hill Book Company, Inc, 1961
Buku Teks
Sergiovanni, Thomas J., author
McGraw-Hill, 1983
Buku Teks
Tagliaferri, Louise E.
John Wiley & Sons, 1979
Buku Teks
Terry, George Robert, author
Richard D. Irwin, 1978
Buku Teks
Riggs, James L., author
McGraw-Hill, 1974
Buku Teks