Copying the words and ideas of others without acknowledging correct ownership is called plagiarism.
Cutting and pasting from several sources to create a paper (even when correctly referenced) is considered plagiarism.
Plagiarising is academically dishonest and is considered cheating. It may result in disciplinary action being taken against you.
The solution is learning to correctly reference material that you have cited within your assessments
Make sure you understand and comply with the assessment requirements set out by your lecturer. If you are in any doubt, ask your lecturer for assistance.