APA (7 वां संस्करण) प्रशस्ति पत्र
Singh, A., & Chowdhary, R. R. (1967). Soil engineering in theory and practice (3rd.). CBS Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Singh, Alam, और R. R. Chowdhary. Soil Engineering in Theory and Practice. 3rd. New Delhi: CBS Publishers, 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Singh, Alam, और R. R. Chowdhary. Soil Engineering in Theory and Practice. 3rd. CBS Publishers, 1967.
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