एपीए उद्धरण

Das, B. m. (2011). Textbook of geotechnical engineering (1.). Cengage Learning.

शिकागो स्टाइल उद्धरण

Das, Braja m. Textbook of Geotechnical Engineering. 1. New Delhi: Cengage Learning, 2011.

एमएलए उद्धरण

Das, Braja m. Textbook of Geotechnical Engineering. 1. Cengage Learning, 2011.