Sitompul, Asril
Citra Aditya Bakti, 2001
Buku Teks SO
Iman Sjahputra Tunggal
Prenhallindo, 2002
Buku Teks SO
Spinello, Richard A.
Jones and Bartlett Learning, 2017
Buku Teks SO
edited by Eric Brousseau, Meryem Marzouki and Cecile Meladel
Cambridge University Press, 2012
Buku Teks SO
Haynes, Colin
Aslib, 1995
Buku Teks SO