Gaspersz, Vincent, author
Gramedia Pustaka Utama, 2007
Buku Teks
North-Holland , 1991
Buku Teks
Buku Teks
Johnstone, Sydney J. (Sydney James), author
John Wiley & Sons, 1961
Buku Teks
edited by Michael E. Porter
Harvard Business School Press , 1986
Buku Teks