Gaya APA
Callahan, E, S.
().
Reinheld Niebuhr's theological synthesis. Excerpta ex dissertatione P.U.G.
.
Roma:
1953.
Gaya MLA
Callahan, E.R.,, S.J..
"Reinheld Niebuhr's theological synthesis. Excerpta ex dissertatione P.U.G. ".
Roma:
1953,
.
Buku.