Huizinga, Johan
H. D. Tjeenk Willink & Zoon N. V. Haarlem, 1958
Buku Teks
Huizinga, Johan
H. D. Tjeenk Willink & Zoon, 1925
Buku Teks
Williamson, Peter J.
Harvard Business School Publishing, 2004
Buku Teks
Frost, Frank J.
D.C Heath, 1980
Buku Teks
Vaganay, Leon, author
Cambridge University Press, 1991
Buku Teks