Gaya APA
Langley, Andrew. (1992).
Resources : Steel .
New York:
Thomson Learning.
Gaya Chicago
Langley, Andrew.
Resources : Steel.
New York:
Thomson Learning,
1992.
Text.
Gaya MLA
Langley, Andrew.
Resources : Steel.
New York:
Thomson Learning,
1992.
Text.
Gaya Turabian
Langley, Andrew.
Resources : Steel.
New York:
Thomson Learning,
1992.
Print.