APA (7th ed.) Citation

Burton, S. H., & Humphries, J. A. (1993). Work out English GCSE key stage 4 / S.H. Burton & J.A. Humphries (3rd ed.). Macmillan.

Chicago Style (17th ed.) Citation

Burton, S. H., and J. A. Humphries. Work Out English GCSE Key Stage 4 / S.H. Burton & J.A. Humphries. 3rd ed. London: Macmillan, 1993.

MLA (9th ed.) Citation

Burton, S. H., and J. A. Humphries. Work Out English GCSE Key Stage 4 / S.H. Burton & J.A. Humphries. 3rd ed. Macmillan, 1993.

Warning: These citations may not always be 100% accurate.