Format: 

Author, A. A. (Year). Title of press release [Press release]. Retrieved from URL

Examples: 

Bridgestone Americas, Inc. (2014). Bridgestone begins producing natural rubber in Mesa, Arizona [Press release]. Retrieved from http://www.bridgestoneamericas.com/en/newsroom/press-releases/2014/bridg...

In-text: (Bridgestone Americas, Inc., 2014, para. 1)

Rosen, E. (2015, August 4). Princeton Review names RIT among best colleges [Press release]. Retrieved from https://www.rit.edu/news/story.php?id=52779

In-text: (Rosen, 2015, para. 3)

Source:

This source type is not covered by the APA style guidelines.
Example(s) adapted from:
APA Style Blog: Press Release