Sikora, J. J. (1968). Calling: A reappraisal of religious life. Herder and Herder.
Lua i Stíl Chicago (17ú heag.)Sikora, Joseph John. Calling: A Reappraisal of Religious Life. [New York]: Herder and Herder, 1968.
Lua MLA (8ú heag.)Sikora, Joseph John. Calling: A Reappraisal of Religious Life. Herder and Herder, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.