| Casebook of office efficiency | Business Publication | Tiada | 1965 | |
| Language planning for unity and efficiency | Penerbit Universiti Malaya | Tiada | 1979 | |
| Language planning for unity and efficiency: a study of the language status and corpus planning of Malaysia | Penerbit Universiti Malaya | Tiada | 1979 | |
| Language planning for unity and efficiency | | Tiada | 1979 | |