Caliwara, C. A. (1963). The exploitation of precast and prestressed concrete in the Philippines. s.n.
芝加哥风格引文Caliwara, Cesar A. The Exploitation of Precast and Prestressed Concrete in the Philippines. [S.l: s.n, 1963.
MLA引文Caliwara, Cesar A. The Exploitation of Precast and Prestressed Concrete in the Philippines. s.n, 1963.
警告：这些引文格式不一定是100％准确.