| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Core Vocabulary of Contemporary English: 6,000 Advanced Words | 978-1-946170-04-0 (1-946170-04-6) | 2016 | Gordon (Guoping) Feng · Mark Davies |
| Core Vocabulary of English: 4,000 Upper-intermediate Words | 978-1-946170-03-3 (1-946170-03-8) | 2016 | Gordon (Guoping) Feng · Mark Davies |