Não informado. (2012). The Bulletin of the Society of Cartographers. Society of Cartographers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Bulletin of the Society of Cartographers. Middlesex, Inglaterra: Society of Cartographers, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Bulletin of the Society of Cartographers. Society of Cartographers, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.