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Lua i Stíl Chicago (17ú heag.)Lee, Li Li, agus Aldrin Abdullah. Solar Heater System Implementation As A Front Step In Overcoming The Global Warming Issues: Case Studies In Seberang Perai Selatan, Penang. 2008.
Lua MLA (9ú heag.)Lee, Li Li, agus Aldrin Abdullah. Solar Heater System Implementation As A Front Step In Overcoming The Global Warming Issues: Case Studies In Seberang Perai Selatan, Penang. 2008.
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