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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, Danyel T. Reiche, Mischa Bechberger, Stefan Körner, और Ulrich Laumanns. Handbook of Renewable Energies in the European Union: Case Studies of the EU-15 States. 2nd rev. and updated ed. Frankfurt am Main ; New York: P. Lang, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, et al. Handbook of Renewable Energies in the European Union: Case Studies of the EU-15 States. 2nd rev. and updated ed. P. Lang, 2005.
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