| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Green Belt Instructional Guide | 978-0-9631358-4-1 (0-9631358-4-8) | 1993 | Master H. C. Hwang |
| Tang Soo Do Soo Bahk Do Moo Duk Kwan: Orange Belt Instructional Guide | 978-0-9631358-3-4 (0-9631358-3-X) | 1993 | H. C. Hwang |