Instructions for this tessellation can be found in Shuzo Fujimoto’s books:
- Twist Origami II, pages 26-27: basic step-by-step instructions and CP
- Introduction to Creative Playing with Origami, pages 158-159: just the CP and pictures of finished model
The design is also found in Eric Gjerde’s book Origami Tessellations, on pages 40-42. There’s a CP and a phototutorial with detailed a description of the folding process.