Gaya APA
Steel Construction. (1937).
New York:
American Institute of Steel Construction.
Gaya Chicago
Steel Construction.
3.
New York:
American Institute of Steel Construction,
1937.
Text.
Gaya MLA
Steel Construction.
3.
New York:
American Institute of Steel Construction,
1937.
Text.
Gaya Turabian
Steel Construction.
New York:
American Institute of Steel Construction,
1937.
Print.