Kahn, Richard F.
University Press, 1972
Buku Teks
Kuznets, Simon Smith, 1901-, author
W.W. Norton&Company-Inc, 1965
Buku Teks
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1969
UI - Skripsi (Membership)
PWN-Polish Scientiic Publishers, 1968
Buku Teks
Stanford Stanford University Press , 1996
Buku Teks