Cita APA (7a ed.)

Campbell, B., Madsen, P., Rush, J., Preedy, M., & Markman, D. D. (2020). North American Tunneling 2020 Proceedings. Society for Mining, Metallurgy & Exploration, Incorporated.

Cita Chicago Style (17a ed.)

Campbell, Brett, Paul Madsen, Jim Rush, Matthew Preedy, y Dawn Dobson Markman. North American Tunneling 2020 Proceedings. Littleton: Society for Mining, Metallurgy & Exploration, Incorporated, 2020.

Cita MLA (8a ed.)

Campbell, Brett, et al. North American Tunneling 2020 Proceedings. Society for Mining, Metallurgy & Exploration, Incorporated, 2020.