In general, books and journal articles will be the main sources of information for your academic work. However, a number of other reliable sources of information are available. These include:
Conference Papers - academic papers presented at conferences
Working Papers - pre-publication academic research papers
Theses and Dissertations
Market Research, Industries & Marketing
Official Publications - publications by national governments and IGOs
Exam Papers - Searchable collection of past exam papers
Use the drop-down links under the Other Resources tab for more information.