Vollmer, E. (1967). Encyclopaedia of hydraulics, soil and foundation engineering. London: Elsevier Publishing Company.
استشهاد بنمط شيكاغوVollmer, Ernst. Encyclopaedia of Hydraulics, Soil and Foundation Engineering. London: Elsevier Publishing Company, 1967.
MLA استشهادVollmer, Ernst. Encyclopaedia of Hydraulics, Soil and Foundation Engineering. London: Elsevier Publishing Company, 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.