Kokusai Kyōryoku Jigyōdan & Indonesia. Direktorat Jenderal Pengairan. (1980). Feasibility study on the Langkemme Irrigation Project: Interim report. Japan International Cooperation Agency.
Citace podle Chicago (17th ed.)Kokusai Kyōryoku Jigyōdan a Indonesia. Direktorat Jenderal Pengairan. Feasibility Study on the Langkemme Irrigation Project: Interim Report. Tokyo, Japan: Japan International Cooperation Agency, 1980.
Citace podle MLA (8th ed.)Kokusai Kyōryoku Jigyōdan a Indonesia. Direktorat Jenderal Pengairan. Feasibility Study on the Langkemme Irrigation Project: Interim Report. Japan International Cooperation Agency, 1980.
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