Gaya APA
Optner, Stanford L. (1973).
Systems analysis .
Australia:
Prentice-Hall.
Gaya Chicago
Optner, Stanford L.
Systems analysis.
Australia:
Prentice-Hall,
1973.
Text.
Gaya MLA
Optner, Stanford L.
Systems analysis.
Australia:
Prentice-Hall,
1973.
Text.
Gaya Turabian
Optner, Stanford L.
Systems analysis.
Australia:
Prentice-Hall,
1973.
Print.