Original quote
'She is always thought of as a tragic figure,' James Freeman says.
We need to explain to our readers who she is in this quote, and since we do not want to change the original wording of a direct quotation, we need to use brackets to insert additional information.
Quote with brackets
'She [Zelda Fitzgerald] is always thought of as a tragic figure,' James Freeman says.
Here, we have changed none of the original words. We have simply placed some additional information in brackets.
An Error in the Source
Sometimes, we will want to quote from a source only to discover that the source contains an error. The error could be something simple like a spelling error or a typo, or the quotation could contain some bit of erroneous information.
We can still use the direct quotation, even with the error, and we can use brackets to show that the error appeared in the source.
The word sic is a Latin word that means 'thus was it written', and this term should be placed inside brackets within a direct quote that contains an error. This notation shows that we recognize the error in the quotation, and it indicates that the error appears in the source we are using.
If we are writing an essay about early explorers, we might decide to include the following direct quotation in our essay.
'Christopher Columbus landed in America in 1493,' according to Mary Luckett.
This direct quotation states that this event occurred in 1493, but we know that the date should be 1492. Since we do not want to change the words of the direct quotation, we could add the word sic in brackets after the erroneous date to show that the date is incorrect.
'Christopher Columbus landed in America in 1493 [sic]~,' according to Mary Luckett.
As in this example, we should also italicize the word sic since it is a foreign phrase. It is not an abbreviation, though, so sic does not require a period.