Kendrick, Tom, author
American Management Association, 2004
eBooks
Bowman, Donald M.
McGraw-Hill , 1963
Buku Teks
Porter, Michael E., author
Free Press a Division of Macmillan, 2004
Buku Teks
Porter, Michael E., author
Free Press, 1980
Buku Teks
Steiner, George A. (George Albert), 1912-, author
Macmillan, 1969
Buku Teks