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2. The SAGE handbook of geographical knowledge;Agnew,2011
3. Polarization without poles: Machiavellian conflicts and the Philippines’ lost decade of democracy, 2000–2010;Arugay;The ANNALS of the American Academy of Political and Social Science,2019
4. ‘I don't care about human rights': Philippines' Duterte acknowledges abuses in drug war. South China morning post;Associated Press,2016
5. Duterte exults: Oligarchy ended without martial law;Aurelio,2020