Datblygu yn yr Eglwys llawlyfr ar gyfer dosbarthiadau o 14 i 18 oed
Thomas, Rheinallt A.
Church of Scotland.Committee on Parish Education.Advancing in the Church.
Caernarfon Llyfrfa'r Methodistiaid Calfinaidd
1976
Adaptation of: 'Advancing in the Church' / prepared by Church of Scotland, Committee on Parish Education, Edinburgh : St Andrew Press, 1974
Christian life.