One way or another, give a citation (5)
I believe the answer is:
refer
This clue might be a double definition.
'one way or another' is the first definition.
'give a citation' is the second definition.
'refer' can be an answer for 'give' (thesaurus). I am not sure about the 'a citation' bit.
Can you help me to learn more?
(Other definitions for refer that I've seen before include "Make allusion, direct attention with words" , "Send a patient to a specialist" , "Allude (to something)" , "Hand over for consideration (to)" , "Advert, mention" .)