primary data is data which has been collected by yourself, which is more reliable and up to date. secondary data has been collected from a secondary source (Other people, business etc.) so it may not...
I've never heard of primary vs. secondary sources ofreading, but I can provide an answer on primary vs. secondary sources of data. A secondary source of data is data that was collected for a reason...
you've come to the right person!! primary dataa is when you collect yourslef , and secondary data is information that someone else has collected , this could be via the internet or through books.