Artikel Jurnal
Stikker
J.B.Wolters, 1951
Buku Teks
Samuelson, Paul A. (Paul Anthony), 1915-2009, author
Balai Lektur Mahasiswa, [date of publication not identified]
Buku Teks
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