Gaya APA
Hartman, H, L.
(1987).
Introductory Mining Engineering
(
1)
.
singaopore:
A Wiley-Interscience Publication.
Gaya MLA
Hartman, Howard, L..
"Introductory Mining Engineering".
1
singaopore:
A Wiley-Interscience Publication,
1987.
Text.