Gaya APA

LOKOLLO, E, M. (2013). Economic and social aspects of palm oil industry . Bogor: Badan Penelitian dan Pengembangan Pertanian Kementerian Pertanian.

Gaya MLA

LOKOLLO, Erna, Maria. "Economic and social aspects of palm oil industry". Bogor: Badan Penelitian dan Pengembangan Pertanian Kementerian Pertanian, 2013. Artikel.