Lua APA (7ú heag.)
Porter, G. R. (1851). The Progress of the nation in its various social and economical relations.
Lua i Stíl Chicago (17ú heag.)
Porter, George Richardson. The Progress of the Nation in Its Various Social and Economical Relations. London, 1851.
Lua MLA (9ú heag.)
Porter, George Richardson. The Progress of the Nation in Its Various Social and Economical Relations. 1851.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.