(Persero), P. P. N. I. (2008). Laporan tahunan PTPN IX th 2007: Spirit on create innovation. PTPN IX.
Chicago Style (17th ed.) Citation(Persero), PT Perkebunan Nusantara IX. Laporan Tahunan PTPN IX Th 2007: Spirit on Create Innovation. PTPN IX, 2008.
MLA (8th ed.) Citation(Persero), PT Perkebunan Nusantara IX. Laporan Tahunan PTPN IX Th 2007: Spirit on Create Innovation. PTPN IX, 2008.
Warning: These citations may not always be 100% accurate.