Cruz, M. S. (1951). The principles and practice of railroad engineering. s.n.
Chicagoスタイル(17版)引用形式Cruz, Mamerto S. The Principles and Practice of Railroad Engineering. [San Mateo, Rizal: s.n, 1951.
MLA(9版)引用形式Cruz, Mamerto S. The Principles and Practice of Railroad Engineering. s.n, 1951.
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