WIDODO, S. (1978). Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWIDODO, SRI. Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM, 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWIDODO, SRI. Indentifying Constraints In Higher Rice Yield In Yogyakarta - Indonesia Sri Widodo. UGM, 1978.
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