APA (7th ed.) Citation

McElroy, M., & Sadler, J. (1994). Chemistry: GCSE/Key stage 4 (2nd ed.). Longman group Ltd.

Chicago Style (17th ed.) Citation

McElroy, Mark, and John Sadler. Chemistry: GCSE/Key Stage 4. 2nd ed. Harlow: Longman group Ltd, 1994.

MLA (9th ed.) Citation

McElroy, Mark, and John Sadler. Chemistry: GCSE/Key Stage 4. 2nd ed. Longman group Ltd, 1994.

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