(1991). Metals industry trends & events. MIRDC/DOST.
Cita Chicago (17th ed.)Metals Industry Trends & Events. Bicutan, Taguig: MIRDC/DOST, 1991.
Cita MLA (9th ed.)Metals Industry Trends & Events. MIRDC/DOST, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.