एपीए उद्धरण

Third international safety conference. (1975). Hazards in tunnelling and on falsework. Institution of civil engineers.

शिकागो स्टाइल उद्धरण

Third international safety conference. Hazards in Tunnelling and on Falsework. London: Institution of civil engineers, 1975.

एमएलए उद्धरण

Third international safety conference. Hazards in Tunnelling and on Falsework. Institution of civil engineers, 1975.