APA (7th ed.) Citation

Clarke, J. S., Liffen, C. L., & York, A. (1990). Structured questions for GCSE science. Hodder & Stoughton.

Chicago Style (17th ed.) Citation

Clarke, J. S., C. L. Liffen, and A. York. Structured Questions for GCSE Science. London: Hodder & Stoughton, 1990.

MLA (9th ed.) Citation

Clarke, J. S., et al. Structured Questions for GCSE Science. Hodder & Stoughton, 1990.