Artikel Jurnal
Buchanan, James M., author
Liberty Fund, Inc., 2000
Buku Referensi
Hunik Sri Runing Sawitri, author
Faculty of Economics and Business Universitas Sebelas Maret,, 2016
Artikel Jurnal
Nika Pranata, author
Indonesian Institute of Sciences (LIPI), 2015
Artikel Jurnal
Boulding, Kenneth E. (Kenneth Ewart), 1910-1993, author
Harper & Row, 1966
Buku Teks