How to upgrade the RAM on your 13-inch MacBook Pro
MacBook Pro: How to remove or install memory - Apple Support
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
Memory RAM Upgrades for MacBook Pro (2012 - Late 2016)
OFFTEK 4GB Replacement Memory RAM Upgrade for Apple MacBook Pro 2.5GHz Intel Core i5 - (13-inch) (DDR3) (Mid-2012) (DDR3-12800) Laptop Memory at Amazon.com
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
My maxed out Mid-2012 13 inch MBP - 16GB of ram and 1.2TB of SSD! : r/mac
Shop Macbook Pro Mid 2012 13 Inch Ram Upgrade | UP TO 55% OFF
16GB 8GB 4GB DDR3 1600MHz RAM for Apple MacBook Pro Mid 2012 sodimm Memory lot | eBay
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
16GB 1600mhz vs 16GB 1866mhz RAM for Macbook Pro 13" mid 2012 | MacRumors Forums
Macbook Pro Apple 13" inch Catalina 10.15 (2012-2014 model) w/ 16GB RAM Upgrade! | eBay
A-Tech for Apple 16GB Kit (2x 8GB) DDR3 1600MHz PC3-12800 204-pin SODIMM MacBook Pro (Mid 2012 13”/15”), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015, 21.5”/27”, Retina 5K) Memory RAM Upgrade at Amazon.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
Buy Refurbished Apple Macbook Pro MD102LL/A 13" Laptop 2.9GHz - 3.6GHz Core i7, A1278 - Techable
Mid 2012 13" inch MacBook Pro A1278 Disassembly RAM SSD Hard Drive Upgrade Repair OSX Install - YouTube
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
Macbook Pro Apple 13" inch Catalina 10.15 (2012-2014 model) w/ 16GB RAM Upgrade! | eBay
MacBook Pro (13-inch, Mid 2012) Hard Drive (and possibly RAM) replacement : r/mac
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 PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Apple macbook pro 13 inch mid 2012 (Maximum RAM and SSD Dual Storage Upgrade) | eBay