Minrath, William R., author
D. Van Nostrand, 1956
Buku Teks
Baber, Anne, author
American Management Association, 2007
eBooks
Hogshead, Sally, author
Harper Business, 2016
Buku Teks
Neuharth, Dan, author
HarperCollins, 2002
Buku Teks
Andersen, Carl E., author
Dow Jones-Irwin, 1986
Buku Teks