Espinosa, J. P. (1997). Canadian developed ice-making technology. Manila Chronicle.
Chicagoスタイル(17版)引用形式Espinosa, Jesus P. "Canadian Developed Ice-making Technology." Manila Chronicle 1997.
MLA(9版)引用形式Espinosa, Jesus P. "Canadian Developed Ice-making Technology." Manila Chronicle, 1997.
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