Orig, T. S. (1999). Photovoltaic (PV) technology can stop people from migrating to congested cities. Manila Bulletin.
Chicago Style (17. basım) AtıfOrig, Thor S. "Photovoltaic (PV) Technology Can Stop People from Migrating to Congested Cities." Manila Bulletin 1999.
MLA (9th ed.) AtıfOrig, Thor S. "Photovoltaic (PV) Technology Can Stop People from Migrating to Congested Cities." Manila Bulletin, 1999.
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