Fowler, H. W. (1976). The Concise Oxford dictionary of current English. First edited by H. W. Fowler and F. G. Fowler (ed. Sixth edition). Clarendon Press. m/s. 95. ISBN0198611218. Big Ben, great bell, clock, and tower, of Houses of Parliament|edition= has extra text (bantuan)
Happy birthday, Big Ben, The Times, January 1 2009, m/s. 1 Check date values in: |date= (bantuan)