Arao, D. A. (1999). How much does government earn from the oil companies? IBON Facts & Figures.
Lua i Stíl Chicago (17ú heag.)Arao, Danilo A. "How Much Does Government Earn from the Oil Companies?" IBON Facts & Figures 1999.
Lua MLA (9ú heag.)Arao, Danilo A. "How Much Does Government Earn from the Oil Companies?" IBON Facts & Figures, 1999.
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