Case, K. (2002). Principles of economics (6th.). Pearson Education.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCase, Karl. Principles of Economics. 6th. Delhi: Pearson Education, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCase, Karl. Principles of Economics. 6th. Pearson Education, 2002.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.