Indonesia. Syiah Kuala University. (1972). Economic contour study of Sumatra (Aceh and North Sumatera). Economic and Social Research Institute, Syiah Kuala University.
Citação do estilo Chicago (17ª ed.)Indonesia. Syiah Kuala University. Economic Contour Study of Sumatra (Aceh and North Sumatera). Darussalan, Aceh: Economic and Social Research Institute, Syiah Kuala University, 1972.
Citação MLA (9ª ed.)Indonesia. Syiah Kuala University. Economic Contour Study of Sumatra (Aceh and North Sumatera). Economic and Social Research Institute, Syiah Kuala University, 1972.
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