Reference materials are various sources (e.g. dictionaries, encyclopedias, almanacs, atlases, bibliographies, handbooks, indexes, etc.) that provide background information or quick facts on any given topic.
Reference sources can be general or specialized (available in print and/or electronic formats) and cannot be checked out of the library.
APA Educational Psychology Handbook by 
Encyclopedia of Educational Psychology by 
Paul Monroe's encyclopedia of psychology of education by 
The Encyclopedia of Positive Psychology by 
McGraw-Hill Education Essential ESL dictionary for learners of English by 
A dictionary of South African education and training by A dictionary of South African education and training by 
Dictionary of Public Health Promotion and Education by 
An International Dictionary of Adult and Continuing Education by 
Psychology of education : a dictionary for students by