APA (7th ed.) Citation

Maclean Hunter Mining and Construction Group. Mining Information Services. (1989). Keystone coal industry manual. Maclean Hunter Publishing Co..

Chicago Style (17th ed.) Citation

Maclean Hunter Mining and Construction Group. Mining Information Services. Keystone Coal Industry Manual. Chicago, Illinois: Maclean Hunter Publishing Co., 1989.

MLA (9th ed.) Citation

Maclean Hunter Mining and Construction Group. Mining Information Services. Keystone Coal Industry Manual. Maclean Hunter Publishing Co., 1989.