Não informado. (1970). Feed and farm supplier. Association of British Organic Fertilisers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Feed and Farm Supplier. London: Association of British Organic Fertilisers, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Feed and Farm Supplier. Association of British Organic Fertilisers, 1970.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.