Gorgen, C. P. (1963). Catholic conscientious objectors. s.n..
Chicago Style aipamenaGorgen, Carol Perry. Catholic Conscientious Objectors. [United States: s.n., 1963.
MLA aipamenaGorgen, Carol Perry. Catholic Conscientious Objectors. s.n., 1963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.