Gaya APA
George, D., Mallery, P. (2020).
IBM SPSS Statistics 26 Step by Step : The Simple Guide and Reference (Cet. 16).
New York:
Routledge.
Gaya MLA
George, Darren., Mallery, Paul.
"IBM SPSS Statistics 26 Step by Step : The Simple Guide and Reference".
Cet. 16
New York:
Routledge,
2020.
Text.