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Tertiary source

language culture Maturity 11-13 Next article →

When you study a topic, you use many kinds of books. Some books collect facts from other places. These are called tertiary sources. They do not add new ideas or opinions. Instead, they summarize what is already known.

These sources help you find key terms. They can help you find other important books too. You might use them to find common knowledge. Some sources come in books. These often use alphabetical order. Other sources are online. You can search them with keywords.

Many things are tertiary sources. Dictionaries and encyclopedias are common examples. You might also use a textbook or a handbook. Some are lists like an index or a bibliography. Other types include almanacs and travel guides. Even Wikipedia is a tertiary source.

It can be hard to tell some sources apart. A dictionary might be a secondary source in some fields. The line between types can change. In some models, a bibliography is a secondary source. A tertiary source then is a mix of primary sources. They are great tools to see the big picture.

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