Federal Ministry of Consumer Protection, Food and Agriculture. (2003). Federal Organic Farming Scheme.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFederal Ministry of Consumer Protection, Food and Agriculture. Federal Organic Farming Scheme. 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFederal Ministry of Consumer Protection, Food and Agriculture. Federal Organic Farming Scheme. 2003.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.