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Dyfyniad Arddull ChicagoZimmerman, M.M. Super Market: Revolution in Distribution. New York: Mcgraw-Hill, 1955.
Dyfyniad MLAZimmerman, M.M. Super Market: Revolution in Distribution. Mcgraw-Hill, 1955.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.