Gaya APA
Ribeiro, R.
(1996).
Engineering Contracts A Management Guide
(
^a1 ^bJilid 1)
.
England:
Butterworth Heinemann.
Gaya MLA
Ribeiro, Robert.
"Engineering Contracts A Management Guide".
^a1 ^bJilid 1
England:
Butterworth Heinemann,
1996.
Text.