APA (7e ed.) Bronvermelding

Private Development Corporation of the Philippines. (1973). The Portland cement industry. PDCP.

Chicago (17e ed.) Bronvermelding

Private Development Corporation of the Philippines. The Portland Cement Industry. [Makati, Rizal]: PDCP, 1973.

MLA (9e ed.) Bronvermelding

Private Development Corporation of the Philippines. The Portland Cement Industry. PDCP, 1973.