Wagner, C. P. (1971). Frontiers in missionary strategy. Moody Press.
Lua i Stíl Chicago (17ú heag.)Wagner, C. Peter. Frontiers in Missionary Strategy. Chicago: Moody Press, 1971.
Lua MLA (9ú heag.)Wagner, C. Peter. Frontiers in Missionary Strategy. Moody Press, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.