Parsons, W. (1938). Early Catholic Publishers of Philadelphia. Washington, D.C..
Lua i Stíl Chicago (17ú heag.)Parsons, Wilfrid. Early Catholic Publishers of Philadelphia. Washington, D.C., 1938.
Lua MLA (8ú heag.)Parsons, Wilfrid. Early Catholic Publishers of Philadelphia. Washington, D.C., 1938.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.