Facts and general knowledge known to almost everyone and easily located in a variety of sources. Examples: water freezes at 0 degrees Celsius and 32 degrees of Fahrenheit.
Your Own Ideas
This is very important to understand. Your own ideas or observations about a topic are those that come before you have read a book or an article. They can also be your original thoughts after the analysis of the topic in other sources.
Your Own Work
If you created a survey, an interview with questions you designed without the use of other sources, a field guide, work of art, a poem or other original work --this information is your own and does not need to be cited.
You Need to Cite
Other people's words.
If directly quoted, they need to be in quotation marks and source provided. If paraphrased, they need to have source of the original words provided.
Other people's ideas.
Responding to other people's arguments or ideas
You need to cite the original argument/idea you are responding to.
Information located on a website
Information created by a corporation or an organization even if there is no single author provided.
The corporation can also be the author.
Ideas, words, notes, etc. used in a lecture, broadcast, podcast or other media.
Pictures used, video clips, audio clips, and other media.