APA (7th ed.) Citation

Hardwick, Khan, & Langmead. (1994). An introduction to modern economics (4th ed.). Longman.

Chicago Style (17th ed.) Citation

Hardwick, Khan, and Langmead. An Introduction to Modern Economics. 4th ed. London: Longman, 1994.

MLA (9th ed.) Citation

Hardwick, et al. An Introduction to Modern Economics. 4th ed. Longman, 1994.

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