Lo, B. (2010). GPS and geocaching in education (First edition.). International Society for Technology in Education.
Lua i Stíl Chicago (17ú heag.)Lo, Burt. GPS and Geocaching in Education. First edition. Eugene, Oregon: International Society for Technology in Education, 2010.
Lua MLA (9ú heag.)Lo, Burt. GPS and Geocaching in Education. First edition. International Society for Technology in Education, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.