Business International S.A & Economist Intelligence Unit (Great Britain). (1960). Business Europe. Business International S.A..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBusiness International S.A और Economist Intelligence Unit (Great Britain). Business Europe. Geneva, Switzerland: Business International S.A., 1960.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBusiness International S.A और Economist Intelligence Unit (Great Britain). Business Europe. Business International S.A., 1960.
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