Yr haf â'r galon oer /
Gibbons, Alan,1953-
Davies, Helen Emanuel.
University of Wales, Aberystwyth.Centre for Educational Studies.
Aberystwyth : Canolfan Astudiaethau Addysg,
2007.
Cyhoeddwyd yn wreiddiol = Originally published : Edinburgh : Barrington Stoke, 2002.
Young adult fiction, Welsh.