Berkman, F. W. Selling today's resorts in tomorrow's market. Hotel Sales Management Association.
Chicago-referens (17:e uppl.)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. New York: Hotel Sales Management Association.
MLA-referens (9:e uppl.)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. Hotel Sales Management Association.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.