Gaya APA

Handy,R.L., ., Spangler,M.G., . (2007). Geotechnical engineering : soil and foundation principles principles and practice (5th.Ed). New York: McGraw-Hill.

Gaya MLA

Handy,R.L., ., Spangler,M.G., . "Geotechnical engineering : soil and foundation principles principles and practice". 5th.Ed New York: McGraw-Hill, 2007. Text.