Hügel, F. (1913). Eternal life: A study of its implications and applications (2nd ed. (rev.).). T. & T. Clark.
Lua i Stíl Chicago (17ú heag.)Hügel, Friedrich. Eternal Life: A Study of Its Implications and Applications. 2nd ed. (rev.). Edinburgh: T. & T. Clark, 1913.
Lua MLA (8ú heag.)Hügel, Friedrich. Eternal Life: A Study of Its Implications and Applications. 2nd ed. (rev.). T. & T. Clark, 1913.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.