why is software program italicized in the text citation?

edited November 27, 2017
page 210 of the APA manual indicates a reference entry is not necessary for standard software and programming languages, including SPSS. However, I did make an entry and it shows italicized for any in text citations. Here are the fields:

Item Type -> Computer Program
Title -> IBM SPSS Statistics for Windows
Version -> 24.0
Date -> 2016
Place -> Armonk, NY
Company -> IBM Corp.

Any idea why the entry shows up italicized?

([italicized from here: IBM SPSS Statistics for Windows, to here], 2016).

Thank you.
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