(1990). Use of computers in the coal industry 1990: Proceedings of the Fourth Conference on the Use of Computers in the Coal Industry, West Virginia University, Morgantown, 20 - 22 June 1990. Balkema.
Chicago-Zitierstil (17. Ausg.)Use of Computers in the Coal Industry 1990: Proceedings of the Fourth Conference on the Use of Computers in the Coal Industry, West Virginia University, Morgantown, 20 - 22 June 1990. Rotterdam [u.a.]: Balkema, 1990.
MLA-Zitierstil (9. Ausg.)Use of Computers in the Coal Industry 1990: Proceedings of the Fourth Conference on the Use of Computers in the Coal Industry, West Virginia University, Morgantown, 20 - 22 June 1990. Balkema, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.