What is the use of op cit?

Using the system of Latin abbreviations, the first quotation from a text is referenced fully with an endnote. In the case of any references which follow, just give the author's name followed by op. cit. (which means 'in the work already quoted') and then the page number - as follows: 11. J.D. Bryant, The Origins of Mythology, London: Carfax Press, 1971, p.234.

12. History Today, Vol XXXIV, No 18, p.123.

13. Bryant, op. cit., p. 387. If the very next quotation is again from the same work, the abbreviation ibid. (which means 'in the same place') is followed by a page reference. You do not need to give the author's name. The sequence just given would therefore be extended: 11. J.D. Bryant, The Origins of Mythology, London: Carfax Press, 1971, p.234.

12. History Today, Vol XXXIV, No 18, p.123.

13. Bryant, op. cit., p. 387.

14. ibid., p. 388.

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