APA (7e ed.) Bronvermelding

North American Tunneling Conference Indianapolis, Ind., ebrary, Inc, & Fowler, M. (2012). North American Tunneling: 2012 proceedings. Society for Mining, Metallurgy and Exploration.

Chicago (17e ed.) Bronvermelding

North American Tunneling Conference Indianapolis, Ind., Inc ebrary, en Matthew Fowler. North American Tunneling: 2012 Proceedings. Englewood, Colo.: Society for Mining, Metallurgy and Exploration, 2012.

MLA (9e ed.) Bronvermelding

North American Tunneling Conference Indianapolis, Ind., et al. North American Tunneling: 2012 Proceedings. Society for Mining, Metallurgy and Exploration, 2012.