Abraham, W. J. (1989). The logic of evangelism. Michigan.
Chicago Style (17th ed.) ZitazioaAbraham, William J. The Logic of Evangelism. WM. B Eerdmans Publishing Company: Michigan, 1989.
MLA (9th ed.) ZitazioaAbraham, William J. The Logic of Evangelism. Michigan, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.