Hampton, David R., author
McGraw-Hill, 1986
Buku Teks
In, Ku Kim-Marshall, author
Hankookmunhwasa, 2006
Buku Teks
Deetz, James
Little, Brown & Co., 1971
Buku Teks
W.H. Freeman, 1982
Buku Teks
edited by Robert Clayton Pierce
Thomson Learning, 2001
Buku Teks