Παραπομπή σε μορφή APA (7η εκδ.)

Gertsch, R. E., & Bullock, R. L. (1998). Techniques in underground mining: Selections from underground mining methods handbook. Society for Mining, Metallurgy, and Exploration.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gertsch, Richard E., και Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. Littleton (USA): Society for Mining, Metallurgy, and Exploration, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gertsch, Richard E., και Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. Society for Mining, Metallurgy, and Exploration, 1998.