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11Published 2010Available for University of the Philippines System via IG Library. Click here to access
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13Published 2009Available for University of the Philippines System via IG Library. Click here to access
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14Published 2009Available for the University of the Philippines System via SAGE Knowledge. Click here to access
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16Published 2005Available for University of the Philippines Diliman via Wiley Online Library. Click here to access
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17
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18
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19Published 1998Available for the University of the Philippines System via SAGE Knowledge. Click here to access
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