Gaya APA

Zamhari, , K, A., Kodarsin, K. (1998). A Blend of Retona 60 & Petroleum Bitumen, Its Characteristics, Properties & Impacts to Asphalt Industry in Indonesia . : s.n..

Gaya MLA

Zamhari, , K., A.., Kodarsin, Kamtomo. "A Blend of Retona 60 & Petroleum Bitumen, Its Characteristics, Properties & Impacts to Asphalt Industry in Indonesia". : s.n., 1998. Computer Software.