(1993). Business English certificate: A guide to the business English certificate. England: University of Cambridge.
Stile di citazione ChicagoBusiness English Certificate: A Guide to the Business English Certificate. England: University of Cambridge, 1993.
Citazione MLABusiness English Certificate: A Guide to the Business English Certificate. England: University of Cambridge, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.