Lua APA (7ú heag.)

(1985). A bibliography of American county histories / compiled by P. William Filby.

Lua i Stíl Chicago (17ú heag.)

A Bibliography of American County Histories / Compiled by P. William Filby. 1985.

Lua MLA (9ú heag.)

A Bibliography of American County Histories / Compiled by P. William Filby. 1985.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.