Não informado. (1950). Rural advisory leaflet. Edinburgh and East of Scotland College of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Rural Advisory Leaflet. Edinburgh, Inglaterra: Edinburgh and East of Scotland College of Agriculture, 1950.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Rural Advisory Leaflet. Edinburgh and East of Scotland College of Agriculture, 1950.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.