| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Yang's Postage Stamp & Postal History Catalogue of Hong Kong | 978-962-85744-6-9 (962-85744-6-9) | 2009 |
| Yang's Postage Stamp and Postal History Catalogue of Hong Kong | 978-962-85744-3-8 (962-85744-3-4) | 2004 |
C. Yang · Chiang Yang · n/c · N C Yang · N.Y.) · Nai C Yang