Gaya APA

OP, Y, C. (1959). After nine hundred years the background of the schism between the eastern and western churches (Neuf cents ans apres) . : fordham univ.

Gaya MLA

OP, Yves, Congar,. "After nine hundred years the background of the schism between the eastern and western churches (Neuf cents ans apres)". : fordham univ, 1959. Text.