Ugo Zanetti and Nathan P. Gibson (eds.), "Christians in China before the year 1550" in Christians in China before the year 1550 last modified January 4, 2016, http://syriaca.org/bibl/792
    
        
            
                
                    
                        A.C.
                        Moule
                    
                    Christians in China before the year 1550
                    http://syriaca.org/bibl/792
                    
                        Londres
                        1930