A-Tech 8GB (2x4GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010, Mid 2011, Late 2011), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
MacBook Unibody Model A1278 RAM Replacement - iFixit Repair Guide
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
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
Upgrading RAM in Your MacBook Pro 13" or 15" : 19 Steps (with Pictures) - Instructables
MacBook Pro 13" Unibody (Mid 2012) Memory Maxxer RAM Upgrade Kit - iFixit Store
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
2012 Macbook Pro 13" A1278 RAM Upgrade - YouTube
512GB SSD Solid State Upgrade - Apple Macbook Pro 10.12 Sierra a1311 a1342 a1278 | eBay
A-Tech 16GB Kit (2x8GB) RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Memory
MacBook Pro 8GB RAM Upgrade - Full Tutorial / Guide - YouTube