Private Development Corporation of the Philippines. (1973). The Portland cement industry. PDCP.
Citazione stile Chigago Style (17a edizione)Private Development Corporation of the Philippines. The Portland Cement Industry. [Makati, Rizal]: PDCP, 1973.
Citatione MLA (9a ed.)Private Development Corporation of the Philippines. The Portland Cement Industry. PDCP, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.