Lua APA (7ú heag.)
Yarotskaya, E. V. Geographical information systems: Study aid.
Lua i Stíl Chicago (17ú heag.)Yarotskaya, E. V. Geographical Information Systems: Study Aid.
Lua MLA (8ú heag.)Yarotskaya, E. V. Geographical Information Systems: Study Aid.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.