Gaya APA
Baum, G, O. (1958).
That they may be one, a study of papal doctrine (Leo XIII- Pius XII). .
London:
Bloomsbury Publishing Co.
Gaya MLA
Baum, G.,, O.S.A..
"That they may be one, a study of papal doctrine (Leo XIII- Pius XII). ".
London:
Bloomsbury Publishing Co,
1958.
Buku.