DAUGHERTY, R. (1974). Science in geography 2: Data collection. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)DAUGHERTY, Richard. Science in Geography 2: Data Collection. Oxford: Oxford University Press, 1974.
Lua MLA (9ú heag.)DAUGHERTY, Richard. Science in Geography 2: Data Collection. Oxford University Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.