Weeks, H. B. (1969). Adventist evangelism in the twentieth century. Review & Herald Publishing Association.
Lua i Stíl Chicago (17ú heag.)Weeks, Howard B. Adventist Evangelism in the Twentieth Century. Washington, D.C: Review & Herald Publishing Association, 1969.
Lua MLA (9ú heag.)Weeks, Howard B. Adventist Evangelism in the Twentieth Century. Review & Herald Publishing Association, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.