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