How to upgrade RAM in your 13" Apple Macbook - YouTube
How-To: Boost your Mac's speed and prolong its useful life with easy RAM upgrades - 9to5Mac
Review Apple MacBook Pro 13 Mid 2009 2.53 GHz - NotebookCheck.net Reviews
MacBook 6,1 (13-Inch, Late 2009) - Full Information | iGotOffer
How to Upgrade A1342 Unibody White MacBook RAM (Memory): EveryMac.com
2008 MacBook Review: Better than a modern MacBook in many ways
OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
How to upgrade a Mac: Swap in new RAM, graphics card, hard drive and more | Macworld
13-inch MacBook Pro Mid 2009 Memory Installation Video - YouTube