Bronffenbrenner, M. (1969). Is the business cycle obsolete? John Wiley.
Dyfyniad Arddull ChicagoBronffenbrenner, M. Is the Business Cycle Obsolete? london: John Wiley, 1969.
Dyfyniad MLABronffenbrenner, M. Is the Business Cycle Obsolete? John Wiley, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.