Birot, P., & Ledesert, M. (1966). General physical geography. George Harrap.
Lua i Stíl Chicago (17ú heag.)Birot, Pierre, agus Margaret Ledesert. General Physical Geography. London: George Harrap, 1966.
Lua MLA (9ú heag.)Birot, Pierre, agus Margaret Ledesert. General Physical Geography. George Harrap, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.