Y Chwyldro Ffrengig 1787-1797.
Gould, Robert.
Canolfan Astudiaethau Addysg.
Great Britain.Welsh Language Education Development Committee.
Aberystwyth : Canolfan Astudiaethau Addysg,
1993.
Ar waelod y clawr blaen = At base of front cover: - Defnyddio tystiolaeth mewn hanes -
These materials were sponsored by the Welsh Office through the Welsh Language Education Development Committee.