Gaya APA
Ching, C. (1989).
Safety and loss prevention in the chemcial and oil processing industries (series 120).
Singapore:
The Institution of chemcal engin..
Gaya MLA
Ching, C.B.
"Safety and loss prevention in the chemcial and oil processing industries".
series 120
Singapore:
The Institution of chemcal engin.,
1989.
Text.