Drew, J. (1967). Selected papers in soil formation and classification. S.S.S.A. Special.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDrew, J. Selected Papers in Soil Formation and Classification. S.S.S.A. Special, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDrew, J. Selected Papers in Soil Formation and Classification. S.S.S.A. Special, 1967.
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