Holden, V. F. (1958). The Yankee Paul: Isaac Thomas Hecker. Bruce Pub..
Lua i Stíl Chicago (17ú heag.)Holden, Vincent F. The Yankee Paul: Isaac Thomas Hecker. Milwaukee: Bruce Pub., 1958.
Lua MLA (8ú heag.)Holden, Vincent F. The Yankee Paul: Isaac Thomas Hecker. Bruce Pub., 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.