Gaya APA

Bowles, J, E. (1989). Physical and geotechnical properties of soils / Joseph E. Bowles (Ed.ke-2). : McGraw-Hill.

Gaya MLA

Bowles, Joseph, E.. "Physical and geotechnical properties of soils / Joseph E. Bowles". Ed.ke-2 : McGraw-Hill, 1989. Skripsi.