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Nurangi Sinaga, M. (2020). PENGARUH FAKTOR SOSIAL TERHADAP KINERJA PEKERJA KEBUN KARET DI PT. PERKEBUNAN SIDOREDJO KABUPATEN SEMARANG. SUNGKAI, 8(1), 1–16. https://doi.org/10.30606/sungkai.v8i1.308