Gaya APA
Bowles, J, E. (1984).
Physical and Geotechnical Properties of Soils, 2nd Edition .
Auckland:
McGraw-Hill Book Company.
Gaya MLA
Bowles, Joseph, E.
"Physical and Geotechnical Properties of Soils, 2nd Edition".
Auckland:
McGraw-Hill Book Company,
1984.
Text.