Gaya APA
Khalid, H, M. (1991).
An Ergonomic Investigation of Road User Behaviour .
Kuala Lumpur:
Jabatan Kerja Raya.
Gaya MLA
Khalid, Halimahtun, Mohd..
"An Ergonomic Investigation of Road User Behaviour".
Kuala Lumpur:
Jabatan Kerja Raya,
1991.
Text.