ASEAN Secretariat, 2016
Buku Teks
Borich, Gary D.
Prentice-Hall, [date of publication not identified]
Buku Teks
Mouly, George G.
Holt, Rinehart and Winston, Inc., 1968
Buku Teks
Tornyay, Rheba de
John Wiley & Sons, 1982
Buku Teks
Tornyay, Rheba de
John Wiley & Sons, 1987
Buku Teks SO