Ross, S. (1988). Introducing physical geography and map reading. Longman.
Lua i Stíl Chicago (17ú heag.)Ross, Simon. Introducing Physical Geography and Map Reading. London: Longman, 1988.
Lua MLA (9ú heag.)Ross, Simon. Introducing Physical Geography and Map Reading. Longman, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.