Gaya APA
Penn, R. Michael. (1971).
Introduction to Infrastructure: An Introduction to Civil and Engineering .
USA:
Wiley.
Gaya Chicago
Penn, R. Michael.
Introduction to Infrastructure: An Introduction to Civil and Engineering.
USA:
Wiley,
1971.
Text.
Gaya MLA
Penn, R. Michael.
Introduction to Infrastructure: An Introduction to Civil and Engineering.
USA:
Wiley,
1971.
Text.
Gaya Turabian
Penn, R. Michael.
Introduction to Infrastructure: An Introduction to Civil and Engineering.
USA:
Wiley,
1971.
Print.