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.
Citação norma ChicagoGertsch, Richard E., and Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. 1a. ed. Littleton: Society for Mining, Metallurgy, and Exploration, Inc, 1998.
Citação norma MLAGertsch, Richard E., and Richard L. Bullock. Techniques in Underground Mining: Selections from Underground Mining Methods Handbook. 1a. ed. Society for Mining, Metallurgy, and Exploration, Inc, 1998.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.