Gaya APA
Boyer, Kenneth D. (1998).
Principles of Transportation Economics .
New York:
Addison-Wesley.
Gaya Chicago
Boyer, Kenneth D.
Principles of Transportation Economics.
New York:
Addison-Wesley,
1998.
Text.
Gaya MLA
Boyer, Kenneth D.
Principles of Transportation Economics.
New York:
Addison-Wesley,
1998.
Text.
Gaya Turabian
Boyer, Kenneth D.
Principles of Transportation Economics.
New York:
Addison-Wesley,
1998.
Print.