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