Gaya APA

Das, B, M., , . (2013). Fundamentals of Geotechnical Engineering, 4th edition . Cengage Learning, 2013: Cengage Learning, 2013.

Gaya MLA

Das, Braja, M.., , . "Fundamentals of Geotechnical Engineering, 4th edition". Cengage Learning, 2013: Cengage Learning, 2013, 2013. .