It doesn't matter where you get the information you are using- When in doubt cite it:
- Direct Quotes
- Paraphrases (rephrased or summarized material)
- Ideas from another work
- Graphs, diagrams, drawings
You do not need to cite:
- Proverbs, sayings example
- Common knowledge or facts*
*Widely-known, generally-accepted information that is not attributable to one source.