Finell, Dorothy, author
American Management Association, 2007
eBooks
Park, William R., author
John Wiley & Sons, 1978
Buku Teks
Abrahan, Joe,author
McGraw-Hill, 2011
Buku Teks
Entrepreneur Press Rich Mintzer
Entepreneur Press, 2011
Buku Teks
Entrepreneur Press, Cheryl Kimball
Entepreneur Press, 2011
Buku Teks