Diaz, J. (2005). Small oil firms now part of oil cartel - lawmaker. Philippine Star.
Chicago-viite (17. p.)Diaz, Jess. "Small Oil Firms Now Part of Oil Cartel - Lawmaker." Philippine Star 2005.
MLA-viite (9. p.)Diaz, Jess. "Small Oil Firms Now Part of Oil Cartel - Lawmaker." Philippine Star, 2005.
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