Cita APA (7th ed.)

Davidson, G. (2014). North American tunneling: 2014 proceedings. Society for Mining Metallurgy and Exploration.

Cita Chicago (17th ed.)

Davidson, Gregg. North American Tunneling: 2014 Proceedings. Colorado: Society for Mining Metallurgy and Exploration, 2014.

Cita MLA (9th ed.)

Davidson, Gregg. North American Tunneling: 2014 Proceedings. Society for Mining Metallurgy and Exploration, 2014.