(1992). From pencil to park: Preserving Olmsted landscapes. National Park Service, U.S. Dept. of the Interior.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFrom Pencil to Park: Preserving Olmsted Landscapes. [Washington, D.C.?]: National Park Service, U.S. Dept. of the Interior, 1992.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFrom Pencil to Park: Preserving Olmsted Landscapes. National Park Service, U.S. Dept. of the Interior, 1992.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.