Apiece of information that is considered common knowledge does not need a citation.
true or false?

True.

Explanation:

An author provides a variety of information through different sources in his/her work not only to substantiate or establish the credibility of his/her claim but also to propose a clear and effective understanding to the readers. This variety of information may include facts, quotations, statistics, etc. which could have been taken from a book, a journal, newspaper article, etc.

Citation is one of the crucial elements of literary writing not only to avoid plagiarism but also to validate the authenticity and originality of the work.

As per the question, the given assertion would be categorized as true as the information sharing common knowledge or general facts need not be cited due to the availability of such information in a number of sources. For example; 'Shakespeare is one of the greatest writers of the English language in general and drama in particular' which is commonly known by almost everyone and can be found in various sources. Thus, it is suggested that such information is not required to be cited. Therefore, the statement would be true.

hey! what was the rest of the question?

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."