How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
A-Tech 4GB PC3-8500 DDR3 1066/1067 MHz RAM for MacBook, MacBook Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) | 204-Pin SODIMM Memory Upgrade Module at Amazon.com
macos - What is the maximum amount of RAM a 2011 MacBook Pro can utilize? - Ask Different
MacBook Pro: How to remove or install memory - Apple Support
A-Tech 8GB PC3-8500 DDR3 1066/1067 MHz RAM for MacBook (Mid 2010 13 inch), MacBook Pro (Mid 2010 13 inch), iMac (Late 2009 27 inch i5/i7), Mac Mini (Mid 2010) | 204-Pin SODIMM Memory Upgrade Module at Amazon.com
8GB (4GBx2) Team High Performance Memory RAM Upgrade For MacBook Pro “Core 2 Duo” 2.8 17” (Mid-2009) MC226LL/AMacBookPro 5,2. The Memory Kit comes with Life Time Warranty. at Amazon.com
MacBook Pro review (13-inch, Mid 2009) | Macworld
Replace your 2009-2012 MacBook Pro HD with an SSD
RAM Upgrades For Apple MacBook (2009 - 2010) from OWC
Apple MacBook Pro 13-inch Mid 2009 - 2.26GHz Core 2 Duo Apple Memory & SSD Upgrades