Ingersoll, R. G. (1884). Orthodoxy: A lecture (Only authorized ed.). C. P. Farrell.
Lua i Stíl Chicago (17ú heag.)Ingersoll, Robert Green. Orthodoxy: A Lecture. Only authorized ed. Washington, D.C.: C. P. Farrell, 1884.
Lua MLA (8ú heag.)Ingersoll, Robert Green. Orthodoxy: A Lecture. Only authorized ed. C. P. Farrell, 1884.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.