This is described as a rambling, handwritten note signed "John Lennon" actually written by his cousin Marilyn McCabe to Oral Roberts in the early 1970s, as quoted in Oral Roberts : An American Life - 1985 by David Edwin Harrell, p. 310. It was later published in full as if it were actually written by Lennon in How to be a Successful Teenager - 1994 by Rick Jones, Ch. 5 : The Secret About Material Things, p. 54.
Statement - 28 August 1965, after meeting Elvis Presley, as quoted in The Leading Men of MGM - 2005 by Jane Ellen Wayne. Also partly quoted in The Beatles : The Authorized Biography - 1968 by Hunter Davies.
Royal Variety Performance in London - 4 November 1963, attended by Queen Elizabeth, the Queen Mother, and Princess Margaret. John had intended to say "fucking jewelry", but was persuaded against doing so by Paul McCartney and the group's manager Brian Epstein.
Playboy - 1980, Interview with David Sheff - September 1980, published - posthumously in Playboy - January 1981.