German Short Row Heel - Step by step tutorial with written instructions
Three Knit Sock Heel Styles for Easily Customized Socks - A Bee In The Bonnet
3 ways to knit a sock heel | LoveCrafts
The Ultimate Sock Guide. 4 Heel Patterns: The Easiest + Second Easiest Socks in the World + Sock with Heel Flap + Gaute Spiral Sock with no heel. – Arne & Carlos Shop
9 Best Knit Sock Heel Types You Need to Try - Knitting Tips