Across
- 4. a book, or article
- 6. websites to use for research
- 8. contains all resources needed
- 10. reasons for an occurrence
- 11. graduation project
Down
- 1. based on observation
- 2. valuable elements in research
- 3. first-hand account
- 5. based on ideas
- 7. is deduced from theory
- 9. _____ the problem