Packard, H. S., & Butler, W. H. Interior of St. Philomeras Church, Pittsburgh, Pennsylvania. Philadelphia: Packard & Butler.
Lua i Stíl Chicago (17ú heag.)Packard, Herbert S., agus William H. Butler. Interior of St. Philomeras Church, Pittsburgh, Pennsylvania. Philadelphia: Packard & Butler.
Lua MLA (8ú heag.)Packard, Herbert S., agus William H. Butler. Interior of St. Philomeras Church, Pittsburgh, Pennsylvania. Philadelphia: Packard & Butler.
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