Gaya APA
The Shell Bitumen Handbook. (1990).
Surrey:
Shell Bitumen UK.
Gaya Chicago
The Shell Bitumen Handbook.
.
Surrey:
Shell Bitumen UK,
1990.
.
Gaya MLA
The Shell Bitumen Handbook.
.
Surrey:
Shell Bitumen UK,
1990.
.
Gaya Turabian
The Shell Bitumen Handbook.
Surrey:
Shell Bitumen UK,
1990.
.