(1915). Yearbook of the United States Department of Agriculture 1915. Government Printing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYearbook of the United States Department of Agriculture 1915. Washington: Government Printing, 1915.
एमएलए (9वां संस्करण) प्रशस्ति पत्रYearbook of the United States Department of Agriculture 1915. Government Printing, 1915.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.