Schmandt, R. H. (1978). A Forgotten Philadelphia writer: William Joseph Walter (1789-1846). Philadelphia.
Lua i Stíl Chicago (17ú heag.)Schmandt, Raymond Henry. A Forgotten Philadelphia Writer: William Joseph Walter (1789-1846). Philadelphia, 1978.
Lua MLA (8ú heag.)Schmandt, Raymond Henry. A Forgotten Philadelphia Writer: William Joseph Walter (1789-1846). Philadelphia, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.