How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Macbook Pro RAM 4GB (2 x 2GB) 2009 2010 2011 2012 A1278 A1286 13 15" DDR3 10600s | eBay
8GB (2x 4GB Kit) Apple MacBook Pro 13-INCH/15-INCH Aluminum Mid 2009 DDR3 Memory | eBay
MacBook Pro - Wikipedia
A-Tech for Apple 6GB Kit (1x2GB + 1x4GB) DDR2 667MHz PC2-5300 200-pin SODIMM for MacBook (Late 2007, Early 2008, Early 2009), MacBook Pro (Mid 2007, Early 2008), iMac (Mid 2007) - Memory RAM Upgrade at Amazon.com
RAM Upgrades For Apple MacBook (2009 - 2010) from OWC
Timetec Hynix IC 8GB Compatible for Apple DDR3 PC3-8500 1067MHz /1066MHz SODIMM Memory Upgrade for MacBook 13 Mid 2010, MacBook Pro 13 Mid 2010, iMac 27Late 2009, Mac Mini Mid 2010 (8GB) - Walmart.com
MacBook Pro: How to remove or install memory - Apple Support
How to Upgrade RAM in a 2009 / 2010 MacBook Pro - Memory Replacement - MacBook Tutorial - YouTube