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Gaya APA
Sawangan, T, P, K.(2005).Peran Pelaku Ekonomi dalam Pelestarian Lingkungan .Jakarta:Depdiknas.
Gaya MLA
Sawangan, Tim, PPPG, Kejuruan."Peran Pelaku Ekonomi dalam Pelestarian Lingkungan".Jakarta:Depdiknas,2005.Text.