Mullen, James X., author
Tian xia wen hua chu ban gu fen you xian gong si, 1997
Buku Teks
Feldman, Daniel C.
McGraw-Hill, 1983
Buku Teks
Tucker, Mary, author
Prentice-Hall, 2002
Buku Teks
Massie, Joseph L., author
Prentice-Hall, 1985
Buku Teks
Weisinger, Hendrie, author
American Management Association, 2000
eBooks