1
Cyhoeddwyd: 2017.
Superior document: De Gruyter Reference Series
Links: Cael y testun llawn
2
Cyhoeddwyd: [2009]
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
3
Cyhoeddwyd: [2019]
Superior document: Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2019 English
Links: Cael y testun llawn; Cael y testun llawn; Cover