Não informado. (2010). The School of Mines Quarterly. Columbia University.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. The School of Mines Quarterly. New York: Columbia University, 2010.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. The School of Mines Quarterly. Columbia University, 2010.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.