APA (7 वां संस्करण) प्रशस्ति पत्र

Orr, A., Nazrul Islam, A. S. M., & Barnes, G. (1991). The Treadle pump: Manual of irrigation for small farmers in Bangladesh. Rangpur Dinajpur Rural Service.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Orr, Alastair, A. S. M. Nazrul Islam, और Gunnar Barnes. The Treadle Pump: Manual of Irrigation for Small Farmers in Bangladesh. Dhaka, Bangladesh: Rangpur Dinajpur Rural Service, 1991.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Orr, Alastair, et al. The Treadle Pump: Manual of Irrigation for Small Farmers in Bangladesh. Rangpur Dinajpur Rural Service, 1991.

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