Hügel, F. (1921). Essays & addresses on the philosophy of religion. J.M. Dent ; E.P. Dutton.
Lua i Stíl Chicago (17ú heag.)Hügel, Friedrich. Essays & Addresses on the Philosophy of Religion. London ; Toronto : New York: J.M. Dent ; E.P. Dutton, 1921.
Lua MLA (8ú heag.)Hügel, Friedrich. Essays & Addresses on the Philosophy of Religion. J.M. Dent ; E.P. Dutton, 1921.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.