C St J Yales. (1992). May I help you: A course for restaurant and bar staff. New York: Prentice-Hall.
Style de citation ChicagoC St J Yales. May I Help You: A Course for Restaurant and Bar Staff. New York: Prentice-Hall, 1992.
Style de citation MLAC St J Yales. May I Help You: A Course for Restaurant and Bar Staff. New York: Prentice-Hall, 1992.
Attention : ces citations peuvent ne pas être correctes à 100%.