Gaya APA

Swanson, C, P., Das, B, M. (2004). Principles of foundation engineering . SingaporeL: SingaporeL: Thompson, 2004.

Gaya MLA

Swanson, Carl, P.., Das, Braja, M. "Principles of foundation engineering". SingaporeL: SingaporeL: Thompson, 2004, 2004. Text.