1
Cyhoeddwyd: 2011.
2
Cyhoeddwyd: 2010.
Superior document: America in the twentieth century
3
4
5
6
Cyhoeddwyd: 2015.
Links: Cael y testun llawn
7
Cyhoeddwyd: 2012.
Superior document: America in the Twentieth Century
Links: Cael y testun llawn
8
Cyhoeddwyd: [2013]
Links: Cael y testun llawn
9
Cyhoeddwyd: [2013]
Superior document: Title is part of eBook package: De Gruyter Gorgias Press Backlist eBook-Package 2001-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
10
Cyhoeddwyd: 2003.
Superior document: LEA's communication series
Links: Cael y testun llawn
11
Cyhoeddwyd: [2012]
Superior document: Title is part of eBook package: De Gruyter Gorgias Press Backlist eBook-Package 2001-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
12
Cyhoeddwyd: [2012]
Superior document: Title is part of eBook package: De Gruyter Gorgias Press Backlist eBook-Package 2001-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
13
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
14
Cyhoeddwyd: [2013]
Superior document: Title is part of eBook package: De Gruyter Gorgias Press Backlist eBook-Package 2001-2013
Links: Cael y testun llawn; Cael y testun llawn; Cover
15
Cyhoeddwyd: [2020]
Superior document: Title is part of eBook package: De Gruyter DG Ebook Package English 2020
Links: Cael y testun llawn; Cael y testun llawn; Cover
16
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
17
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
18
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
19
Cyhoeddwyd: [2010]
Superior document: Title is part of eBook package: De Gruyter DGBA Linguistics and Semiotics - <1990
Links: Cael y testun llawn; Cael y testun llawn; Cover