Baer, Werner, author
Richard D. Irwin, 1965
Buku Teks
Potter, David M., author
Gadjah Mada University Press , 1990
Buku Teks
Zanden, Jan Luiten van, author
Routledge, 2012
Buku Teks
Wernette, Philip
Macmillan, 1955
Buku Teks
Favaro, Edgardo
International Center for Economic Growth, 1989
Buku Teks