Cân a Mawl: llyfr hymna a thonau Methodistiaid Calfinaidd Unol Dalaethau yr America=Song and Praise: the hymnal of the Calvinistic Methodist Church of the United States of America page 117

Text:	Bywha dy waith, O Argylwydd mawr! (Come, O Creator Spirit blest!)
Author:	John Roberts
Author:	E. Caswall

Cân a Mawl: llyfr hymna a thonau Methodistiaid Calfinaidd Unol Dalaethau yr America=Song and Praise: the hymnal of the Calvinistic Methodist Church of the United States of America‎ p. 117