Roueche, Berton
Little, Brown, 1967
Buku Teks
Adams, Bradley J., author
Elsevier, 2012
Buku Teks
Springer, 2012
eBooks
Waite, Stephen, author
Prentice-Hall, 2000
Buku Teks
chief contributor, Tim Hindle ; edited with an introduction by. Margaret Lawrence
Harvard Business School Press, 1994
Buku Referensi