Marotta, Theodore W.
Prentice-Hall, 1997
Buku Teks SO
Marotta, Theodore W.
Pearson-Prentice-Hall, 2005
Buku Teks SO
Watson, Don A. [Donald Arthur]
McGraw-Hill, c1978
Buku Teks SO
Hornbostel, Caleb
John Wiley & Sons, 1978
Buku Teks SO
Taylor, G.D.
Longman, 1985
Buku Teks SO