(1999). Mga pumasa sa exam: Metallurgical, mining engineer at geologist. Kabayan.
Chicagoスタイル(17版)引用形式"Mga Pumasa Sa Exam: Metallurgical, Mining Engineer at Geologist." Kabayan 1999.
MLA(9版)引用形式"Mga Pumasa Sa Exam: Metallurgical, Mining Engineer at Geologist." Kabayan, 1999.
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