Gaya APA

WIDIYANTO, G. (2014). Development of Ultrasonography for Downhole Well Inspection . Jakarta Selatan: LEMIGAS R&D Centre for Oil and Gas Techonology.

Gaya MLA

WIDIYANTO, Gathuk. "Development of Ultrasonography for Downhole Well Inspection". Jakarta Selatan: LEMIGAS R&D Centre for Oil and Gas Techonology, 2014. Artikel.