APA (7th ed.) Citation

Hardwick, P., Langmead, J., & Khan, B. (1990). An introduction to modern economics (3rd ed.). Longman.

Chicago Style (17th ed.) Citation

Hardwick, Philip, John Langmead, and Bahadur Khan. An Introduction to Modern Economics. 3rd ed. London: Longman, 1990.

MLA (9th ed.) Citation

Hardwick, Philip, et al. An Introduction to Modern Economics. 3rd ed. Longman, 1990.