Παραπομπή σε μορφή APA (7η εκδ.)

Hustrulid, W. A., & Bullock, R. L. (2001). Underground mining methods: Engineering fundamentals and international case studies. Society for Mining, Metallurgy, and Exploration, Inc.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hustrulid, William A., και Richard L. Bullock. Underground Mining Methods: Engineering Fundamentals and International Case Studies. Littleton: Society for Mining, Metallurgy, and Exploration, Inc, 2001.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hustrulid, William A., και Richard L. Bullock. Underground Mining Methods: Engineering Fundamentals and International Case Studies. Society for Mining, Metallurgy, and Exploration, Inc, 2001.