Hugo, V., & Hugo, V. (1880). Philosophie. Hetzel ; Quantin.
Lua i Stíl Chicago (17ú heag.)Hugo, Victor, agus Victor Hugo. Philosophie. Paris: Hetzel ; Quantin, 1880.
Lua MLA (8ú heag.)Hugo, Victor, agus Victor Hugo. Philosophie. Hetzel ; Quantin, 1880.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.