International Conference on Soil Mechanics and Foundation Engineering (1936- ) Tokyo, Japan). (1978). Soil sampling: Presented at the Specialty Session 2, Ninth International Conference on Soil Mechanics and Foundation Engineering. The Conference.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Conference on Soil Mechanics and Foundation Engineering (1936- ) Tokyo, Japan). Soil Sampling: Presented at the Specialty Session 2, Ninth International Conference on Soil Mechanics and Foundation Engineering. Tokyo: The Conference, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Conference on Soil Mechanics and Foundation Engineering (1936- ) Tokyo, Japan). Soil Sampling: Presented at the Specialty Session 2, Ninth International Conference on Soil Mechanics and Foundation Engineering. The Conference, 1978.