1
Cyhoeddwyd: 2009;, 2009
2
Cyhoeddwyd: c2012.
Links: Cael y testun llawn
3
Cyhoeddwyd: [2014]
Superior document: Title is part of eBook package: De Gruyter DGBA Backlist Complete English Language 2000-2014 PART1
Links: Cael y testun llawn; Cael y testun llawn; Cover
4
Cyhoeddwyd: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Backlist Complete English Language 2000-2014 PART1
Links: Cael y testun llawn; Cael y testun llawn; Cover