Gaya APA
Libby, James R., Perkins, Norman D.. (1976).
Modern Prestressed Concrete Highway Bridge Superstructures .
California:
Grantville.
Gaya Chicago
Libby, James R., Perkins, Norman D..
Modern Prestressed Concrete Highway Bridge Superstructures.
California:
Grantville,
1976.
Text.
Gaya MLA
Libby, James R., Perkins, Norman D..
Modern Prestressed Concrete Highway Bridge Superstructures.
California:
Grantville,
1976.
Text.
Gaya Turabian
Libby, James R., Perkins, Norman D..
Modern Prestressed Concrete Highway Bridge Superstructures.
California:
Grantville,
1976.
Print.