Hansen, Bent
Harvard University Press , 1958
Buku Teks
Rolph, Earl R.
University of California Press, 1956
Buku Teks
Lindholm, Richard W., author
Pitman, 1950
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M. Gusti Bustami, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2014
UI - Skripsi (Membership)
Mikesell, John L., author
Cengage Learning, 2018
Buku Teks