Gaya APA
GPL reference guide for IBM SPSS statistics. (2010).
:
SPSS Inc.
Gaya Chicago
GPL reference guide for IBM SPSS statistics.
.
:
SPSS Inc,
2010.
Electronic Resource.
Gaya MLA
GPL reference guide for IBM SPSS statistics.
.
:
SPSS Inc,
2010.
Electronic Resource.
Gaya Turabian
GPL reference guide for IBM SPSS statistics.
:
SPSS Inc,
2010.
Electronic Resource.