Lua APA (7ú heag.)
ebrary, Inc, & Otgaar, A. H. J. (2010). Industrial tourism: Opportunities for city and enterprise. Ashgate.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Alexander H. J. Otgaar. Industrial Tourism: Opportunities for City and Enterprise. Burlington, Vt.: Ashgate, 2010.
Lua MLA (9ú heag.)
ebrary, Inc, agus Alexander H. J. Otgaar. Industrial Tourism: Opportunities for City and Enterprise. Ashgate, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.