APA (7e ed.) Bronvermelding

U.S. Symposium on Rock Mechanics Minnesota, Minneapolis, & Cundall, P. A. (1988). Key questions in rock mechanics: Proceedings of the 29th U.S. symposium. A.A. Balkema.

Chicago (17e ed.) Bronvermelding

U.S. Symposium on Rock Mechanics Minnesota, Minneapolis, en P. A. Cundall. Key Questions in Rock Mechanics: Proceedings of the 29th U.S. Symposium. Rotterdam, Netherlands: A.A. Balkema, 1988.

MLA (9e ed.) Bronvermelding

U.S. Symposium on Rock Mechanics Minnesota, Minneapolis, en P. A. Cundall. Key Questions in Rock Mechanics: Proceedings of the 29th U.S. Symposium. A.A. Balkema, 1988.