Gaya APA
Widadi, N., Sena, A. (2016).
Safety management systems: fundamental concepts framework (Ed. 1).
Jakarta:
Halaman Moeka.
Gaya MLA
Widadi, Novyanto., Sena, Afen.
"Safety management systems: fundamental concepts framework".
Ed. 1
Jakarta:
Halaman Moeka,
2016.
Text.