Optimis Donk, Guys!
| Author | : | Triani Retno A. |
| Publisher | : | Gema Insani |
| ISBN | : | - |
| Year | : | 0 |
| Subject | : | Language and Literature |
| Language | : | Indonesia |
| Number of Pages | : | - |
| Author | : | Triani Retno A. |
| Publisher | : | Gema Insani |
| ISBN | : | - |
| Year | : | 0 |
| Subject | : | Language and Literature |
| Language | : | Indonesia |
| Number of Pages | : | - |
