Manley, John F.
Macmillan, 1976
Buku Teks SO
Hird, John A.
Wadsworth , 2004
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
Nathan, James A.
Little, Brown, 1983
Buku Teks