Lawrence R. Frey...[et al.]
Prentice-Hall, 1991
Buku Teks
Zechmeister, Eugene B., author
McGraw-Hill, 1992
Buku Teks
Winardi, author
Alumni, 1979
Buku Teks
edited by Tony Greenfield
Arnold , 1996
Buku Teks
Jacobsen, Kathyn, author
Jones & Bartlett Learning, 2012
Buku Teks