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1de réir Van den Bergh, HubertAvailable for University of the Philippines Baguio via IG Library. Click here to access
Foilsithe / Cruthaithe 2010
Electronic Resource -
2de réir Friginal, EricAvailable for University of the Philippines Baguio via EBSCO with URL: http://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=267369. Click here to request
Foilsithe / Cruthaithe 2009
Electronic Resource