Box Stitch Crochet: Use the Corner-to-Corner Stitch in New Ways to Make 20 Hats, Wraps, Scarves & Accessories: Amazon.co.uk: Freeman, Corinne: 9780811717649: Books
Box Stitch Knitting Pattern | Don't Be Such a Square
Box Stitch – written, photo, and video crochet tutorial - Jessie At Home