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