Perpillou, A. V. (1966). Human geography. Longmans.
Lua i Stíl Chicago (17ú heag.)Perpillou, Aimé Vincent. Human Geography. Gran Bretaña: Longmans, 1966.
Lua MLA (9ú heag.)Perpillou, Aimé Vincent. Human Geography. Longmans, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.