- Author: Joseph P. Duggan
- Language: English
- Year: 2019
- Author: R. Glenn Hubbard, William Duggan
- Language: English
- Year: 2009
- Author: John P. Duggan
- Language: English
- Year: 1985
- Author: Cinzia Arruzza, Dave Kellaway, Cinzia Arruzza, Penelope Duggan, Marie Lagatta
- Language: English
- Year: 2013
- Author: Phil Cohen Mike Duggan
- Language: English
- Year: 2021
- Author: Eva von Redecker Lucy Duggan (transl.)
- Language: English
- Year: 2021
- Author: Joseph J. Duggan
- Language: English
- Year: 1989
- Author: Davide Arcidiacono Mike Duggan
- Language: English
- Year: 2019
- Author: Lisa Duggan
- Language: English
- Year: 2012
- Author: Patrick Duggan
- Language: English
- Year: 2012