Gaya APA

PRASETYO, B, H., SUHARTA, N. (2011). Genesis and properties of peat at Toba highland area of north Sumatra . Jakarta: Agricultural Research and Development.

Gaya MLA

PRASETYO, Bambang, Hendro., SUHARTA, Nata. "Genesis and properties of peat at Toba highland area of north Sumatra". Jakarta: Agricultural Research and Development, 2011. Artikel.