Não informado. (1970). Extension Bulletin. Asian and Pacific Council, Food and Fertilizer Technology Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Extension Bulletin. Taipei: Asian and Pacific Council, Food and Fertilizer Technology Center, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Extension Bulletin. Asian and Pacific Council, Food and Fertilizer Technology Center, 1970.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.