David, D., & Davidescu, V. (1982). Evaluation of fertility by plant and soil analysis. Abacus Press & Tunbridge Wells.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavid, Davidescu, और Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. England: Abacus Press & Tunbridge Wells, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDavid, Davidescu, और Velicica Davidescu. Evaluation of Fertility by Plant and Soil Analysis. Abacus Press & Tunbridge Wells, 1982.
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