Gaya APA
IBM SPSS complex samples 19. (2010).
:
IBM.
Gaya Chicago
IBM SPSS complex samples 19.
.
:
IBM,
2010.
Electronic Resource.
Gaya MLA
IBM SPSS complex samples 19.
.
:
IBM,
2010.
Electronic Resource.
Gaya Turabian
IBM SPSS complex samples 19.
:
IBM,
2010.
Electronic Resource.