Chip Heath and Dan Heath
Broadway Books, 2010
Buku Teks
Harvard Business School Press, 2004
Buku Teks
Jie Lu, Lakhmi C. Jain, Guangquan Zhang, editor
[, Springer-Verlag], 2012
eBooks
Kahane, Adam, author
Berrett-Koehler Publishers, 2012
Buku Teks
Steele, Fritz
University of Massachusetts, 1975
Buku Teks