Apple Macbook Pro 13 661-6588 Intel Motherboard for sale online | eBay
Apple Memory Module 4GB 1066MHz DDR3 (PC3-8500) - 2x2GB SO-DIMMs at Amazon.com
A-Tech 8GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Apple MacBook Pro 13" Laptop A1278 UPGRADED 8 GB RAM+128GB SSD solid state drive | eBay
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
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
Apple MacBook Pro 13" A1278 MID-2010 Logic Board 2.66 GHz 820-2879-B | eBay
MacBook Pro 15" Unibody Late 2008 and Early 2009 RAM Replacement - iFixit Repair Guide
1GB Black Diamond Memory Module for Apple MacBook Pro A1278 (13.3" Core 2 Duo 2.4GHz) DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.com
4GB RAM Memory (PC3-8500) for Apple MacBook 13 inch A1278 Late 2008, A1342 Late 2009, A1342 Mid 2010. Apple MacBook Pro 13 inch A1278 Mid 2009, A1278 Mid 2010, A1286 - Late 2008
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
MacBook Unibody Model A1278 RAM Replacement - iFixit Repair Guide
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.5 13" Mid-2012 - A7 at Amazon.com
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
CMS 8GB (1X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® MacBook Pro Core I5 2.4 13.3" Md313Ll/A A1278 - A14 at Amazon.com