Upgrade RAM (8GB) on MacBook 13' Late 2009 and mid 2010 [Guide] - YouTube
MacBook Pro 15" Unibody Late 2008 and Early 2009 RAM Replacement - iFixit Repair Guide
apple MacBook 13 128 hd 4 gb ram late 2009 good battery macos seierr | eBay
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 27''Late 2009, Mac Mini Mid 2010 (8GB) - Newegg.com
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
2GB DDR2 800MHz RAM Memory Upgrade for Apple MacBook 13-inch (Mid 2009) (PARTS-QUICK) - Walmart.com
13-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube