APA (7th ed.) Citation

Clare Kirtley & Georgie Birkett. (1999). My very first Oxford dictionary. Oxford University Press.

Chicago Style (17th ed.) Citation

Clare Kirtley and Georgie Birkett. My Very First Oxford Dictionary. London: Oxford University Press, 1999.

MLA (9th ed.) Citation

Clare Kirtley and Georgie Birkett. My Very First Oxford Dictionary. Oxford University Press, 1999.