Luthan, J. (1972). Value added of the mining and quarrying industries in South Sumatra, 1970. Lembaga Ekonomi dan Kemasjarakatan Nasional.
Citace podle Chicago (17th ed.)Luthan, Julian. Value Added of the Mining and Quarrying Industries in South Sumatra, 1970. [Djakarta: Lembaga Ekonomi dan Kemasjarakatan Nasional, 1972.
Citace podle MLA (8th ed.)Luthan, Julian. Value Added of the Mining and Quarrying Industries in South Sumatra, 1970. Lembaga Ekonomi dan Kemasjarakatan Nasional, 1972.
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