Veblen, Throstein
The Viking Press, Inc. , 1934
Buku Teks
Rose, John David, author
Authorhouse, 2005
Buku Teks
Institute for Alternative Futures, 1983
Buku Teks
Vesterman, William
[publisher not identified], [date of publication not identified]
Buku Teks
Flinn, M.W., author
Longman, 1969
Buku Teks