COOPER CHRIS. (1993). TOURISM: PRINCIPLES & PRACTICE. PITMAN PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)COOPER CHRIS. TOURISM: PRINCIPLES & PRACTICE. LONDON: PITMAN PUBLICATIONS, 1993.
Lua MLA (9ú heag.)COOPER CHRIS. TOURISM: PRINCIPLES & PRACTICE. PITMAN PUBLICATIONS, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.