Handbooks are similar to encyclopedias but more focused on a specific area, and each 'executive summary' is chapter length with more in-depth coverage of the field. Handbooks typically have 5-10 pages of citations at the end of the summary. To find additional handbooks try a keyword search in the Portland State Library catalog, using handbook and your topic area.
Click on Business & Management or Psychology to access relevant encyclopedias or do a keyword search in the search box.
Scholarly Dictionaries are the go-to source for definitions of terms as used specifically by a particular discipline (terms may have different meanings, usages between different disciplines like psychology and sociology).