Não informado. (1957). Tobacco abstracts: Citations and abstracts; world literature onnicotiana. Tobacco Literature Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Tobacco Abstracts: Citations and Abstracts; World Literature Onnicotiana. Raleigh, NC: Tobacco Literature Service, 1957.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Tobacco Abstracts: Citations and Abstracts; World Literature Onnicotiana. Tobacco Literature Service, 1957.
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