• Books: Generally, a good source for a Lit Review.
• identifies gaps in previous studies; identifies flawed methodologies and/or theoretical approaches; avoids replication of mistakes.
• identifies possible trends or patterns in the literature.
• Government/corporate reports: A good source for a Lit Review.
Many government departments and corporations commission or carry out research.
It demonstrates that you have not only thoroughly researched your topic but also carefully examined and critically evaluated the range of relevant sources.
In writing the Lit Review, your purpose is to convey to your reader what knowledge and ideas have been established on a topic and what their strengths and weaknesses are.
These can be useful in providing the latest research or research that has not been published.
They are also helpful in providing information on which people are currently involved in which research areas, and so can be helpful in tracking down other work by the same researchers.
Textbooks are unlikely to be useful for including in your Lit Review as they are intended for teaching, not for research, but they do offer a good starting point from which to find better, more detailed sources.
• Conference proceedings: A good source for a Lit Review.