J. M. Fiey, Jeanne-Nicole Mellon Saint-Laurent and David A. Michelson, (eds.), "The History of Abba Marcus of Mount Tharmaka" in The History of Abba Marcus of Mount Tharmaka last modified August 3, 2016, http://syriaca.org/bibl/2242
    
        
            
                
                    
                        Arnold Evert
                        Look
                    
                    The History of Abba Marcus of Mount Tharmaka
                    http://syriaca.org/bibl/2242
                    805
                    http://zotero.org/groups/392292/items/MZFZSCPV
                    
                        Oxford
                        1929