PanAmerican Conference on Soil Mechanics and Foundation Engineering (14th : Puerto Rico) & American Society of Civil Engineers. Soil Mechanics and Foundations Division. (1971). Proceedings of the 4th PanAmerican conference on soil mechanics and foundation engineering, Puerto Rico, 1971. American Society of Civil Engineers.
Чикаго стиль цитування (17-те видання)PanAmerican Conference on Soil Mechanics and Foundation Engineering (14th : Puerto Rico) та American Society of Civil Engineers. Soil Mechanics and Foundations Division. Proceedings of the 4th PanAmerican Conference on Soil Mechanics and Foundation Engineering, Puerto Rico, 1971. New York: American Society of Civil Engineers, 1971.
Стиль цитування MLA (8-ме видання)PanAmerican Conference on Soil Mechanics and Foundation Engineering (14th : Puerto Rico) та American Society of Civil Engineers. Soil Mechanics and Foundations Division. Proceedings of the 4th PanAmerican Conference on Soil Mechanics and Foundation Engineering, Puerto Rico, 1971. American Society of Civil Engineers, 1971.