Day, R., W.(2012).Geotechnical earthquake engineering handbook: with the 2012 international building code (ed. 2nd).new york:Akademi Komunitas Perkebunan Yogyakarta.
Gaya MLA
Day, R., W..Geotechnical earthquake engineering handbook: with the 2012 international building code.ed. 2ndnew york:Akademi Komunitas Perkebunan Yogyakarta,2012.Text.