Gaya APA

al.], W, W, S, H, [. (2014). Ultrasound-assisted transesterification of refined and crude palm oils using heterogeneous palm oil mill fly ash supported calcium oxide catalyst . : The Authors.

Gaya MLA

al.], Wilson, Wei, Sheng, Ho, [et. "Ultrasound-assisted transesterification of refined and crude palm oils using heterogeneous palm oil mill fly ash supported calcium oxide catalyst". : The Authors, 2014. e-journal.