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1Được phát hành 2020Available for University of the Philippines System via IG Publishing. Click here to access
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4Bằng Lee, JohnAvailable for University of the Philippines System via IG Publishing. Click here to access
Được phát hành 2019
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6Được phát hành 2019Available for University of the Philippines Baguio via De Gruyter. Click here to access
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8Được phát hành 2015Available for the University of the Philippines System via Oxford scholarship online. Click here to access
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9Được phát hành 2014Available for University of the Philippines System via Taylor & Francis Online. Click here to access
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