Verkuyl, J. (1978). Contemporary missiology: An introduction. W. B. Eerdmans Pub. Co..
Lua i Stíl Chicago (17ú heag.)Verkuyl, Johannes. Contemporary Missiology: An Introduction. Grand Rapids: W. B. Eerdmans Pub. Co., 1978.
Lua MLA (9ú heag.)Verkuyl, Johannes. Contemporary Missiology: An Introduction. W. B. Eerdmans Pub. Co., 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.