Worthington, I. (2000). The business environmentIan Worthington, Chris Britton. Pearson Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorthington, Ian. The Business EnvironmentIan Worthington, Chris Britton. Pearson Education, 2000.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorthington, Ian. The Business EnvironmentIan Worthington, Chris Britton. Pearson Education, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.