Iowa State University. Cooperative Extension Service. Dairy Husbandry and Dairy Products Extension Service publications and records.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIowa State University. Cooperative Extension Service. Dairy Husbandry and Dairy Products Extension Service Publications and Records.
एमएलए (8वां संस्करण) प्रशस्ति पत्रIowa State University. Cooperative Extension Service. Dairy Husbandry and Dairy Products Extension Service Publications and Records.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.