"I Should Have Known Better" is a song by English rock band the Beatles composed by John Lennon, and originally issued on A Hard Day's Night, their soundtrack for the film of the same name released on 10 July 1964. Wikipedia
Lyricists: John Lennon and Paul McCartney
Composers: John Lennon and Paul McCartney
A-side: "A Hard Day's Night"
Genre: Pop rock
Producer(s): George Martin
Recorded: 25–26 February 1964