Fusfeld, Daniel Roland, 1922-, editor
Scott, Foresman and Company, 1986
Buku Teks
Galbraith, John Kenneth, 1908-2006, author
British Broadcasting Corporation, 1977
Buku Teks
Commons, John R.
The University of Wisconsin Press, 1961
Buku Teks
Negishi, Takashi
Cambridge University Press , 1985
Buku Teks
Zimmerman, L.J., author
Uitgeverij Albani, 1947
Buku Teks