Herberg. Indonesia: A Regional Energy Leader in Transition. National Bureau of Asian Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHerberg. Indonesia: A Regional Energy Leader in Transition. National Bureau of Asian Research.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHerberg. Indonesia: A Regional Energy Leader in Transition. National Bureau of Asian Research.
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