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2gan Schoenbach, LisiAvailable for University of the Philippines Baguio via Oxford Scholarship Online. Click here to access
Cyhoeddwyd 2012
Electronic Resource -
3gan Desmond, Kathleen KadonAvailable for University of the Philippines System via Wiley Online Library. Click here to access
Cyhoeddwyd 2011
Electronic Resource -
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6
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7
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8Cyhoeddwyd 2008Available for University of the Philippines Baguio via Wiley Online Library. Click here to access
Electronic Resource -
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10gan Wicke, PeterAvailable for University of the Philippines Baguio via Cambridge Books Online. Click here to access
Cyhoeddwyd 1990
Electronic Resource