SINGH, B., & GUPTA, D. (1981). Soil mechanics and foundation engineering for degree andAMIE sectin B (new scheme) diploma, final year students. Katson Publishing House.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)SINGH, Bharat, و D.L GUPTA. Soil Mechanics and Foundation Engineering for Degree AndAMIE Sectin B (new Scheme) Diploma, Final Year Students. Ludhiana: Katson Publishing House, 1981.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)SINGH, Bharat, و D.L GUPTA. Soil Mechanics and Foundation Engineering for Degree AndAMIE Sectin B (new Scheme) Diploma, Final Year Students. Katson Publishing House, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.