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1Được phát hành 2019Available for University of the Philippines System via IG Publishing. Click here to access
Electronic Resource -
2
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3Bằng Haynes, Jeffrey 1953-Available for University of the Philippines System via IG Publishing. Click here to access
Được phát hành 2019
Electronic Resource -
4Bằng Henson, Maria Rosa L. 1927-lấy văn bản
Được phát hành 2017
(viewed 10 June 2019)
Electronic Resource -
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6Được phát hành 2015Available for the University of the Philippines System via Oxford scholarship online. Click here to access
Electronic Resource -
7Bằng Molyneaux, George 1985-Available for the University of the Philippines System via Oxford scholarship online. Click here to access
Được phát hành 2015
Electronic Resource -
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9
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10