Phillips, T., Norsworthy, B., & Whalin, T. (1997). The world at your door. Bethany House.
Lua i Stíl Chicago (17ú heag.)Phillips, Tom, Bob Norsworthy, agus Terry Whalin. The World at Your Door. Minneapolis, Minn.: Bethany House, 1997.
Lua MLA (9ú heag.)Phillips, Tom, et al. The World at Your Door. Bethany House, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.