Identify the source of the following information whether it is a primary, secondary or tertiary information.

1. 1987 Philippine Constitution
2. English 10 Learner's Material
3. Forbes
4. Bohol Chronicle
5. Patent
6. Monograph
7. Dictionaries
8. Directories
9. Bibliographies
10. Standards
11. Review of progress
12. Official publication (government)
13. List of research in progress
14. Guide to libraries
15. Yearbook
16. Treaties
17. Trade Literature
18. Conference Proceedings
19. Research report
20. Guide to the literature



Plss po kailngan ko sagot ngayun ol class namin. ​