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Gaya APA

Usman, N, D, N, H. (2005). Teknik Pengambilan Keputusan . Jakarta: Jakarta: Grasindo.

Gaya MLA

Usman, Nachrowi, Djalal, Nachrowi/, Hardius. "Teknik Pengambilan Keputusan". Jakarta: Jakarta: Grasindo, 2005. Text.