Professional/Trade sources:Professional or trade sources are written by and for professionals or practitioners in a particular field or discipline, but are not strictly research related. Popular sources can be written by almost anyone, from freelance journalists to experts, but are always meant to appeal to a general audience.Scholarly publications (Journals)
Scholarly publications (Journals)A scholarly journal has a board of referees (or reviewers) who are experts within their field. They evaluate the quality of submitted articles (academically, as well as its content and language) and if the article suits the journal's subject matter.Popular sources (News and Magazines)
A popular source: Is a publication, such as a newspaper or magazine that you could buy in a grocery store. Is often illustrated with colorful pictures and advertisements. Is many times written by journalists or professional writers for a general audience.
Explanation:
there are many but i hope this three types may help you!
Oral historians, because many of the ancient civilizations got passed down beliefs which led them to be able to get their customs and beliefs through oral historians
