Reference resources are a good place to start your research, because they help you to learn about an unfamiliar topic, narrow your topic by presenting specific issues within broader subject areas, identify keywords describing your topic, and identify important names and dates relating to your topic that help you to search other sources more efficiently.
Encyclopedia of Sports Science (Print)
Encyclopedia of Sports Medicine (Online)
Encyclopedia of Applied Psychology (Online)
Encyclopedia of Mental Health (Print)
Mental Measurements Yearbook (Print)
Health Sciences & Psychology Databases