Williams, S. (1998). Tourism geography. Routledge.
Lua i Stíl Chicago (17ú heag.)Williams, Stephen. Tourism Geography. London ; New York: Routledge, 1998.
Lua MLA (9ú heag.)Williams, Stephen. Tourism Geography. Routledge, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.