Rafferty, M. D. (1992). A geography of world tourism. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Rafferty, Milton D. A Geography of World Tourism. Englewood Cliffs, N.J: Prentice Hall, 1992.
Lua MLA (9ú heag.)Rafferty, Milton D. A Geography of World Tourism. Prentice Hall, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.