Não informado. (2001). Annual report of the Committee of the Free Public Library and the Derby Museum of the Borough of Liverpool. Committee of the Free Public Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Committee of the Free Public Library and the Derby Museum of the Borough of Liverpool. Liverpool, Inglaterra: Committee of the Free Public Library, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Committee of the Free Public Library and the Derby Museum of the Borough of Liverpool. Committee of the Free Public Library, 2001.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.