Não informado. (1949). Economic report. Edinburgh and East of Scotland College of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Economic Report. Edinburgh, Inglaterra: Edinburgh and East of Scotland College of Agriculture, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Economic Report. Edinburgh and East of Scotland College of Agriculture, 1949.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.