Oxford University Press · University of California Press
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Tagalog reference grammar | 978-0-520-01776-4 (0-520-01776-5) | 1972 |
| Teaching English Pronunciation to the Twi-speaking Student | 978-0-19-713802-1 (0-19-713802-0) | 1962 |