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
How to upgrade MacBook Pro RAM (2009-2012) - YouTube
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
Reemplazo de RAM de MacBook Pro 15" Unibody 2.53 GHz de mediados de 2009 - Guía de reparación iFixit
MacBook Pro 15" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Timetec 8GB KIT(2x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 for Mac Book,
OFFTEK 4GB Memoria RAM de Repuesto para Apple MacBook Pro 2.4GHz Intel Core 2 Duo - (13-Inch) (Mid 2010) (DDR3-8500) Memoria para portátil : Amazon.es: Informática
15-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube