Gaya APA

Head, , K. (1980). Manual of Soil Laboratory Lesting, Volume 1: Soil classification & Compaction Tests, Volume 2: Permeability, Shear Strength and Compressibility Tests . London: Pentech Press.

Gaya MLA

Head, , K.H.. "Manual of Soil Laboratory Lesting, Volume 1: Soil classification & Compaction Tests, Volume 2: Permeability, Shear Strength and Compressibility Tests". London: Pentech Press, 1980. Text.