Francovich, G. (1951). Arnold J. Toynbee: Heidegger y Whitehead. Raigal.
Lua i Stíl Chicago (17ú heag.)Francovich, Guillermo. Arnold J. Toynbee: Heidegger Y Whitehead. Buenos Aires: Raigal, 1951.
Lua MLA (9ú heag.)Francovich, Guillermo. Arnold J. Toynbee: Heidegger Y Whitehead. Raigal, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.