Bleichmar, D. The geography of observation: Distance and visibility in eighteenth-century botancial travel / Daniela Bleichmar. Histories of scientific observation.(2011).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBleichmar, Daniela. "The Geography of Observation: Distance and Visibility in Eighteenth-century Botancial Travel / Daniela Bleichmar." Histories of Scientific Observation.(2011) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रBleichmar, Daniela. "The Geography of Observation: Distance and Visibility in Eighteenth-century Botancial Travel / Daniela Bleichmar." Histories of Scientific Observation.(2011), .
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