APA (7 वां संस्करण) प्रशस्ति पत्र
Singh Alam. Soil engineering in theory and practise: Volume 1 fundamentals and general principles (4th ed.). CBS Pblisher.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Singh Alam. Soil Engineering in Theory and Practise: Volume 1 Fundamentals and General Principles. 4th ed. New Delhi: CBS Pblisher.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Singh Alam. Soil Engineering in Theory and Practise: Volume 1 Fundamentals and General Principles. 4th ed. CBS Pblisher.
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