Shackley, M. (1998). Visitor management: Case studies from world heritage sites. Butterworth Heinemnn.
Lua i Stíl Chicago (17ú heag.)Shackley, Myra. Visitor Management: Case Studies from World Heritage Sites. Oxford: Butterworth Heinemnn, 1998.
Lua MLA (9ú heag.)Shackley, Myra. Visitor Management: Case Studies from World Heritage Sites. Butterworth Heinemnn, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.