Howell, P. (2015). A Letter from Patrick Howell, S.J. e-Publications@Marquette.
Lua i Stíl Chicago (17ú heag.)Howell, Patrick. A Letter from Patrick Howell, S.J. e-Publications@Marquette, 2015.
Lua MLA (8ú heag.)Howell, Patrick. A Letter from Patrick Howell, S.J. e-Publications@Marquette, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.