Não informado. (1979). European Applied Research Reports. Harwood Academic Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. European Applied Research Reports. Chur, Suíça: Harwood Academic Publishers, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. European Applied Research Reports. Harwood Academic Publishers, 1979.
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