एपीए उद्धरण

(1979). Pertinent questions about investing in success at the hub of Europe. Germany: Economic Development Corporation for North Rhine- Westphalia.

शिकागो स्टाइल उद्धरण

Pertinent Questions About Investing in Success At the Hub of Europe. Germany: Economic Development Corporation for North Rhine- Westphalia, 1979.

एमएलए उद्धरण

Pertinent Questions About Investing in Success At the Hub of Europe. Germany: Economic Development Corporation for North Rhine- Westphalia, 1979.