APA
das b. M., . (1990). pronciples of foundation engineering. boston: pws-kent publihing company.
Chicago
das braja M, . 1990. pronciples of foundation engineering. boston: pws-kent publihing company.
Harvard
das b. M., . (1990). pronciples of foundation engineering. boston: pws-kent publihing company.
MLA
das braja M, . pronciples of foundation engineering. boston: pws-kent publihing company. 1990.