Não informado. (1917). Journal of the Department of Agriculture. University of Puerto Rico.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Department of Agriculture. Rio Piedras, Porto Rico: University of Puerto Rico, 1917.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the Department of Agriculture. University of Puerto Rico, 1917.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.