एपीए उद्धरण

(1975). Hazards in Tunnelling and on Faleswork. Institution of Civil Engineers.

शिकागो स्टाइल उद्धरण

Hazards in Tunnelling and on Faleswork. London: Institution of Civil Engineers, 1975.

एमएलए उद्धरण

Hazards in Tunnelling and on Faleswork. Institution of Civil Engineers, 1975.