Gaya APA

Niebuhr, H, R. (1989). Faith on earth: an inquiry into the structure of human faith Ed. & preface by Richard R. Niebuhr. . New Haven: Yale UP.

Gaya MLA

Niebuhr, H., Richard. "Faith on earth: an inquiry into the structure of human faith Ed. & preface by Richard R. Niebuhr. ". New Haven: Yale UP, 1989. Buku.