Lund, Arnie, author
Elsevier, 2011
Buku Teks
Bolton, Robert, author
American Management Association, 1984
eBooks
Bolton, Robert, author
American Management Associations, 1984
Buku Teks
Balinger Pub. Co., 1974
Buku Teks
Black, James Menzies, author
Ghalia Indonesia, 1980
Buku Teks