Timothy , D. J., & Boyd, S. W. (2003). Heritage tourism. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Timothy , Dallen J., agus Stephen W. Boyd. Heritage Tourism. Harlow, England: Prentice Hall, 2003.
Lua MLA (9ú heag.)Timothy , Dallen J., agus Stephen W. Boyd. Heritage Tourism. Prentice Hall, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.