Cita APA (7th ed.)

Gertsch, R. E., & Bullock, R. L. (1998). Techniques in underground mining: Selections from underground mining methods handbook (1a. ed.). Society for Mining, Metallurgy, and Exploration, Inc.

Cita Chicago (17th ed.)

Gertsch, Richard E., i Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. 1a. ed. Littleton: Society for Mining, Metallurgy, and Exploration, Inc, 1998.

Cita MLA (9th ed.)

Gertsch, Richard E., i Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. 1a. ed. Society for Mining, Metallurgy, and Exploration, Inc, 1998.