APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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