Gaya APA

Hakim, ., M.T, I, R, . (2007). Operating Lubricating Oil Blending Plant (LOB) Unit Produksi Pelumas Surabaya . PTK Akamigas: .

Gaya MLA

Hakim, ., M.T, Ir.Hj, Risayekti, . "Operating Lubricating Oil Blending Plant (LOB) Unit Produksi Pelumas Surabaya". PTK Akamigas: , 2007. Kertas Kerja Wajib.