Walker, S. (2009). Travel resources: An annotated guide. Scarecrow Press.
Lua i Stíl Chicago (17ú heag.)Walker, Stephen. Travel Resources: An Annotated Guide. Lanham, Md.: Scarecrow Press, 2009.
Lua MLA (9ú heag.)Walker, Stephen. Travel Resources: An Annotated Guide. Scarecrow Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.