| Zeti Akhtar Ungku Aziz, Dr. (Gab. Bank Negara) | Dewan Bahasa dan Pustaka | Tiada | 2002 | |
| McGraw-Hill encyclopedia of science & technology 6: gab-hys | McGraw-Hill Book Company Inc. | Tiada | 1982 | 0070792801 |
| McGraw-Hill yearbook of science and technology 6: gab-hys | McGraw-Hill Book Company Inc. | Tiada | 1960 | |