citing / sighting / siting are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
citing: NA
sighting: (noun) the act of observing.
siting: NA
citing: s·AY·t·ih·ng
sighting: s·AY·t·ih·ng
siting: s·AY·t·ih·ng
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)