How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Pro: How to remove or install memory - Apple Support
8GB Kit (2x4GB) PC3-8500 DDR3 1067MHz 1066MHz RAM Upgrade for Late 2008, Early/Mid/Late 2009, Mid 2010 MacBook, MacBook Pro, iMac, Mac Mini at Amazon.com