How to Upgrade MacBook Pro RAM, Late 2008, 15-Inch: EveryMac.com
Max RAM on late 2008 MacBook Pro | MacRumors Forums
How to Upgrade RAM on MacBook Pro, iMac & More | AVG
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Max RAM on late 2008 MacBook Pro | MacRumors Forums