How to Foundation Single Crochet: 15 Steps (with Pictures)
How to Crochet the Bottom Side of a Foundation Chain - Shiny Happy World
How to Foundation Single Crochet: 15 Steps (with Pictures)
A Guide to Crochet Cordage – Morale Fiber
The Secret to the Perfect Chainless Foundation Chain for sc, hdc, dc and tr - Crochet Tutorial - Nicki's Homemade Crafts
How to crochet a "no-chain" foundation row from the book The Complete Photo Guide to Crochet by Margaret Hubert | Crochet, Crochet basics, Crochet techniques
Learn to Crochet: Foundation Chain by Megan Goodacre – Tricksy Knitter