Hird, John A.
Wadsworth , 2004
Buku Teks SO
Manley, John F.
Macmillan, 1976
Buku Teks SO
Clarke E. Cochran, Lawrence C. Mayer, T.R. Carr, N. Joseph Cayer, Mark J. McKenzie, Laura R. Peck
USA Cengage Learning, 2016
Buku Teks SO
Stone, Deborah.
W.W. Norton & Co. , 2002
Buku Teks SO
by James W. Ceaser ... [and others]
McGraw-Hill , 1984
Buku Teks SO