Indonesia. Direktorat Penyuluhan Pertanian. (1971). Improvement and strengthening of agricultural extension activities. Directorate of Agricultural Extension.
Citace podle Chicago (17th ed.)Indonesia. Direktorat Penyuluhan Pertanian. Improvement and Strengthening of Agricultural Extension Activities. [Djakarta]: Directorate of Agricultural Extension, 1971.
Citace podle MLA (8th ed.)Indonesia. Direktorat Penyuluhan Pertanian. Improvement and Strengthening of Agricultural Extension Activities. Directorate of Agricultural Extension, 1971.
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