1
Cyhoeddwyd: 2003.
Superior document: LEA's communication series
Links: Cael y testun llawn
2
Cyhoeddwyd: [2016]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2016 Part 1
Links: Cael y testun llawn; Cael y testun llawn; Cover
3
Cyhoeddwyd: [2013]
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: [2015]
Superior document: Title is part of eBook package: De Gruyter DG Plus DeG Package 2015 Part 1
Links: Cael y testun llawn; Cael y testun llawn; Cover