F, J. D. A. A. Z. Z. H. M. I. A. A. (2019). Distribution of bulk unit weight of residual soils from the Northern Malaysia. Journal of Physics: Conference Series, 1349(1), . https://doi.org/10.1088/1742-6596/1349/1/012025
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)F, Jamalludin D.; Ahmad A.; Zakaria Z.; Hashim M.; Ibrahim A.; Ahmad. "Distribution of Bulk Unit Weight of Residual Soils from the Northern Malaysia." Journal of Physics: Conference Series 1349, no. 1 (2019). https://doi.org/10.1088/1742-6596/1349/1/012025.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)F, Jamalludin D.; Ahmad A.; Zakaria Z.; Hashim M.; Ibrahim A.; Ahmad. "Distribution of Bulk Unit Weight of Residual Soils from the Northern Malaysia." Journal of Physics: Conference Series, vol. 1349, no. 1, 2019, https://doi.org/10.1088/1742-6596/1349/1/012025.