Childs, G. W. (1868). The Public Ledger Building, Philadelphia: With an account of the proceedings connected with its opening, June 20, 1867. G.W. Childs.
Chicago-referens (17:e uppl.)Childs, George William. The Public Ledger Building, Philadelphia: With an Account of the Proceedings Connected with Its Opening, June 20, 1867. Philadelphia: G.W. Childs, 1868.
MLA-referens (8:e uppl.)Childs, George William. The Public Ledger Building, Philadelphia: With an Account of the Proceedings Connected with Its Opening, June 20, 1867. G.W. Childs, 1868.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.