Não informado. (1942). Plant science literature. U.S. Department of Agriculture, Bureau of Plant Industry.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Plant Science Literature. Washington: U.S. Department of Agriculture, Bureau of Plant Industry, 1942.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Plant Science Literature. U.S. Department of Agriculture, Bureau of Plant Industry, 1942.
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