Berkman, F. W. Selling today's resorts in tomorrow's market. Hotel Sales Management Association.
Lua i Stíl Chicago (17ú heag.)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. New York: Hotel Sales Management Association.
Lua MLA (9ú heag.)Berkman, Frank W. Selling Today's Resorts in Tomorrow's Market. Hotel Sales Management Association.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.