Yes, CITATIONS is a Scrabble word!

Letter values in Scrabble US: C 3, I 1, T 1, A 1, T 1, I 1, O 1, N 1, S 1.

Is it a valid word?

CITATIONS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

an official award (as for bravery or service) usually given as formal public statement
(law) the act of citing (as of spoken words or written passages or legal precedents etc.)
a short note recognizing a source of information or of a quoted passage
a passage or expression that is quoted or cited
a summons that commands the appearance of a party at a proceeding
thoroughbred that won the triple crown in 1948