Gaya APA
Booch, G, J, R, I, J. (1998).
The unified modeling languange user guide .
Mexico city:
Addison Wesley Longman.
Gaya MLA
Booch, Grady,, James, Rumbaugh,, Ivar, Jacobson.
"The unified modeling languange user guide".
Mexico city:
Addison Wesley Longman,
1998.
Text.