Nwachukwu, J. (2018). Organic Matter: The Source of Our Wealth. Obafemi Awolowo University Press Limited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNwachukwu, J.I. Organic Matter: The Source of Our Wealth. Obafemi Awolowo University Press Limited, 2018.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNwachukwu, J.I. Organic Matter: The Source of Our Wealth. Obafemi Awolowo University Press Limited, 2018.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.