Robinson, G. W. (2005). Soils, their origin, constitution, and classification: An introduction to pedology. Biotech.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRobinson, Gilbert Wooding. Soils, Their Origin, Constitution, and Classification: An Introduction to Pedology. Biotech, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRobinson, Gilbert Wooding. Soils, Their Origin, Constitution, and Classification: An Introduction to Pedology. Biotech, 2005.
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