Held, Lewis I., 1951-, author
Cambridge University Press, 2014
Buku Teks
editors, P. Schidrowthz, T.R. Dawson
W. Heffer and Sons, 1952
Buku Teks
Hadi Kusuma, author
2008
UI - Tesis (Open)
Bauer, P. T., author
Harvard University Press, 1948
Buku Teks
Desy Rosmerya, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2009
UI - Tesis (Open)