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Buku Teks
Fryer, D.W., author
McGraw-Hill, 1965
Buku Teks
Heller, Walter W.
[publisher not identified], 1974?
Buku Teks
M. Irsyad Ilham, author
Faculty of Economic and Business UIN Syarif Hidayatullah, 2018
Artikel Jurnal
World Bank
Oxford University Press, 1988
Buku Teks