MacBook Pro 15" Unibody Late 2011 RAM Replacement - iFixit Repair Guide
How to Upgrade RAM in MacBook Pro 17" 2011 16GB Install Tutorial - YouTube
Samsung ram Memory Upgrade DDR3 PC3 12800, 1600MHz, 204 PIN, SODIMM for 2012 Apple MacBook Pro's, 2012 iMac's, and 2011/2012 Mac Mini's (8GB kit (2 x 4GB)) at Amazon.com
Macbook Pro RAM Upgrade Kit- 8GB (2 x 4GB) for 2011 2012 A1278 A1286 13 15" inch 649528754257 | eBay
Memory/ RAM Upgrades For Apple MacBook Pro 2011 from OWC
Timetec Hynix IC 8GB Compatible for Apple DDR3L 1600MHz PC3L-12800 SODIMM Memory Upgrade for Early/Mid/Late 2011, Mid/Late 2012, Early/Late 2013, Late 2014, Mid 2015 MacBook Pro, iMac, Mac Mini (8GB) - Newegg.com
How to Upgrade MacBook Pro RAM (2009, 2010, 2011, 2012): EveryMac.com
13-inch MacBook Pro Early 2011 Memory Installation Video - YouTube
Apple 10SOHYN1GB 1.0GB -Hynix Factory Original... at MacSales.com
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
Old MacBook Pro repair. Back when you could upgrade the SSD and Ram! : r/mac
16GB MacBook Pro RAM Upgrade (2011/2012/2013) - YouTube
Memory RAM Upgrade for Apple MacBook Pro 15-inch Mid 2012 4GB/8GB DDR3 SODIMM | eBay
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
8GB PC3-10600 RAM for Apple MacBook Pro Late 2011 - 15 Inch MD322LL/A - MD322xx/A
MacBook Pro 13" Unibody Early 2011 RAM Replacement - iFixit Repair Guide
Upgrading the Late 2011 MacBook Pro to 16 GB of RAM! - YouTube