Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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