Bailley, Norman T. J.
John Wiley & Sons, 1977
Buku Teks SO
Gerstman, B. Burt
Jones and Barlett Publishers, 2008
Buku Teks
Schork, M. Anthony
Prentice-Hall, 2000
Buku Teks SO
Finney, D.J.
Chapman & Hall, 1980
Buku Teks SO
Gerstman, B. Burt
Massachusetts Jones & Bartlett Learning, 2015
Buku Teks