Nodiadau Adolygu : CBAC TGAU Daearyddiaeth (My Revision NotesDirk Sykes, Rachel Crutcher · First published 2018Open the Tome
TGAU Daearyddiaeth Ar Gyfer Cbac ADirk Sykes, Stacey Burton-Mc Cabe, Glyn Saunders Jones · First published 2012Open the Tome
Gcse Geography for Wjec a Revision GuideDirk Sykes, Stacey McCabe · First published 2010Open the Tome
TGAU Daearyddiaeth Ar Gyfer Manyleb A CBACAndy Owen, Jo Pritchard, Colin Lancaster, Jacqui Owen, Dirk Sykes · First published 2010Open the Tome
GCSE Geography for WJEC a CoreAndy Owen, Colin Lancaster, Dirk Sykes · First published 2009Open the Tome
