Gaya APA
Libby, James R.. (1977).
Modern Prestressed Concrete (2nd ed).
New York:
VNR.
Gaya Chicago
Libby, James R..
Modern Prestressed Concrete.
2nd ed
New York:
VNR,
1977.
.
Gaya MLA
Libby, James R..
Modern Prestressed Concrete.
2nd ed
New York:
VNR,
1977.
.
Gaya Turabian
Libby, James R..
Modern Prestressed Concrete.
2nd ed
New York:
VNR,
1977.
.