Johnson, R. A., & Wallwork, E. (1973). Critical issues in modern religion. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Johnson, Roger A., agus Ernest Wallwork. Critical Issues in Modern Religion. Englewood Cliffs, N.J: Prentice-Hall, 1973.
Lua MLA (9ú heag.)Johnson, Roger A., agus Ernest Wallwork. Critical Issues in Modern Religion. Prentice-Hall, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.