Here's why:
* Exact words: Quotations must be precisely the same as the original source.
* Another person: They are always attributed to someone else, not your own words.
* Spoken or written: Quotations can come from spoken conversations, published articles, books, or any other written material.
* Repeated by someone else: You are re-using the words of the original speaker or writer.
Let me know if you need further clarification or examples!