(2000). Soil samplingtechnical engineering and design guides as adapted from the US Army Corps of Engineers, No. 30. ASCE.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSoil Samplingtechnical Engineering and Design Guides as Adapted from the US Army Corps of Engineers, No. 30. ASCE, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSoil Samplingtechnical Engineering and Design Guides as Adapted from the US Army Corps of Engineers, No. 30. ASCE, 2000.
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