Harvard Business School Publishing Corporation, 2001
Buku Teks
Harvard Business School Press, 1998
Buku Teks
Heilman, Madeline E.
Richard D. Irwin, 1982
Buku Teks
Harvard Business School Press, 2001
Buku Teks
Greenberg, Jerald
Prentice-Hall, 2003
Buku Teks