Gaya APA
Guilbert, J, M., Jr, C, F, P. (2007).
The Geology of Ore Deposits .
United State of America:
Waveland Press.
Gaya MLA
Guilbert, John, M.., Jr, Charles, F., Park,.
"The Geology of Ore Deposits".
United State of America:
Waveland Press,
2007.
Textbook.