sight, site, cite

Sight or sight means vision, or the capacity to see--
His sight was poor, so he needed glasses.
They hope his sight will improve with medical treatment.
Sight may refer to the view before someone--the thing that is seen--
What a sight the house was!
You're a sight for sore eyes! ( good )
You're a sight! ( bad )
To sight something ( verb or action word ) may mean to have it in view--
If you sight the enemy approaching, give the alarm.
They hoped to sight land soon.
Shoot them on sight!

Site or site ( rhymes with sight ) means a place or location, often used to mean where something is planned, but not yet in existence, or where something used to be--
Is this the site of the new building?
They erected a memorial at the site of the World Trade Center.
We ought to be able to handle this on site.

Cite or cite ( rhymes with sight ) means to quote something from a book or other reference, such as a computer file or encyclopedia--
If you cite a reference book, make sure to include it in your bibliography.
The preacher could cite large portions of the Bible from memory.
Some people like to cite famous authors when they write articles.

Now that you know that, you can say--
"I want to cite the news report about what an awful sight the site of the explosion was."

Note--when you cite something, your "citing" of it is called a "citation"--
You forgot to include the reference for this citation.
Citation also means some kinds of traffic tickets--
The officer gave her a citation for speeding.
Citation may also mean a commendation or award,  usually in writing--
The mayor gave him a citation for good citizenship.
 Note # 2--"in situ" is Latin for "on site", used to mean, legally, "in its original place"--
The grand jury would like to examine the evidence in situ.
Not to be confused with "on site", meaning here at our location--
We will handle all of the business on site. 
Note # 3--a "sighting" means a view of something, as of an unusual or are occurence--
There was another UFO sighting last night.