MacBook Pro: How to remove or install memory - Apple Support
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Mac Book Pro(Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
MacBook Pro: How to remove or install memory - Apple Support
How to upgrade RAM on MacBook (M1 & M2 Macs included)
MacBook Pro: How to remove or install memory - Apple Support