Gaya APA
Optner, Stanford L. (1973).
System Analysis .
England:
Pinguin Books Ltd.
Gaya Chicago
Optner, Stanford L.
System Analysis.
England:
Pinguin Books Ltd,
1973.
Text.
Gaya MLA
Optner, Stanford L.
System Analysis.
England:
Pinguin Books Ltd,
1973.
Text.
Gaya Turabian
Optner, Stanford L.
System Analysis.
England:
Pinguin Books Ltd,
1973.
Print.