1
Cyhoeddwyd: 2020;, 2020.
2
Cyhoeddwyd: [2013]
Superior document: Title is part of eBook package: De Gruyter Penn Press eBook Package Complete Collection
Links: Cael y testun llawn; Cael y testun llawn; Cover
3
Cyhoeddwyd: [2023]
Superior document: Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2023 English
Links: Cael y testun llawn; Cael y testun llawn; Cover
4
Cyhoeddwyd: [2021]
Superior document: Title is part of eBook package: De Gruyter Penn State University Press Complete eBook-Package Pre-2014
Links: Cael y testun llawn; Cael y testun llawn; Cover