Berkman, F. W. Selling today's resorts in tomorrow's market. Hotel Sales Management Association.
Citazione stile Chigago Style (17a edizione)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. New York: Hotel Sales Management Association.
Citatione MLA (9a ed.)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. Hotel Sales Management Association.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.