Stelzer, Irwin M.
International Institute for Economic Research, 1980
Buku Teks
Massimo de Angelis, Toby Carroll, Tania Murray Li, Ben Fine; Muhtar Habibi, editor
Intrans Publishing, 2016
Buku Teks
Przeworski, Adam, author
Cambridge, 2003
Buku Teks
Funk, Ernest M.
John Wiley & Sons, 1955
Buku Teks
Kolb, David A., author
Prentice-Hall, 1974
Buku Teks