| Source | Frequency | Percentage |
| Mother | 90 | 27.0% |
| Father | 37 | 11.1% |
| Guardian | 12 | 3.6% |
| Teacher | 94 | 28.1% |
| Friends | 33 | 10.0% |
| TV/Radio | 115 | 34.4% |
| Magazines | 42 | 12.6% |
| Seminar | 61 | 18.3% |
| Internet | 43 | 12.9% |