K H Head. (1994). Manual of soil laboratory testing; Vol.2: Permeability, shear strength and compressibility tests. London: Pentech Press.
استشهاد بنمط شيكاغوK H Head. Manual of Soil Laboratory Testing; Vol.2: Permeability, Shear Strength and Compressibility Tests. London: Pentech Press, 1994.
MLA استشهادK H Head. Manual of Soil Laboratory Testing; Vol.2: Permeability, Shear Strength and Compressibility Tests. London: Pentech Press, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.