Private Development Corporation of the Philippines. (1973). The portland cement industry. s.n.].
Style de citation Chicago (17e éd.)Private Development Corporation of the Philippines. The Portland Cement Industry. [Makati, Rizal: s.n.], 1973.
Style de citation MLA (9e éd.)Private Development Corporation of the Philippines. The Portland Cement Industry. s.n.], 1973.
Attention : ces citations peuvent ne pas être correctes à 100%.