Tom used a magazine article as a secondary source in his report about the US Civil War.
A secondary source should describe, discuss, interpret, comment upon, analyze, evaluate, summarize, and process primary sources.
A good investigator always checks with a secondary source.
Citrus fruits are a good source of vitamin C
Lake Victoria is the source of the Nile River. The disease came from an unknown source. Reading was his greatest source of pleasure.
If you are asked to annotate a bibliography, you will briefly summarize each source.
I am not writing a sentence using that word.
I can give you a sentence using the word galaxy.
This is a sentence using the word aviator.
a sentence using the word endotracheal
The reporter wanted to aver the validity of her source, so she ran a background check on him.
I love this blue source
This is a sentence using the word monomer. :P
I am saying a sentence using the word collagen.
this is a sentence using the word armchair.