Gaya APA
Hay, William W.. (1953).
Railroad engineering .
New York:
John Wiley.
Gaya Chicago
Hay, William W..
Railroad engineering.
New York:
John Wiley,
1953.
Text.
Gaya MLA
Hay, William W..
Railroad engineering.
New York:
John Wiley,
1953.
Text.
Gaya Turabian
Hay, William W..
Railroad engineering.
New York:
John Wiley,
1953.
Print.