(Persero), P. P. X. P. P. X. SEMINAR SEHARI ERGONOMI PABRIK GULA, 30 NOPEMBER 1992. [s.n].
Chicago Style (17th ed.) Citation(Persero), PT Perkebunan XXI-XXII.ed. PT Perkebunan XXI-XXII. SEMINAR SEHARI ERGONOMI PABRIK GULA, 30 NOPEMBER 1992. [s.n].
MLA (8th ed.) Citation(Persero), PT Perkebunan XXI-XXII.ed. PT Perkebunan XXI-XXII. SEMINAR SEHARI ERGONOMI PABRIK GULA, 30 NOPEMBER 1992. [s.n].
Warning: These citations may not always be 100% accurate.