Citazione Stile APA (7a Edizione)

Hardwick, P., Khan, B., & Langmead, J. (1999). An introduction to modern economics (5th ed.). Peason education Limited.

Citazione stile Chigago Style (17a edizione)

Hardwick, Philip, Bahadur Khan, e John Langmead. An Introduction to Modern Economics. 5th ed. Harlow: Peason education Limited, 1999.

Citatione MLA (9a ed.)

Hardwick, Philip, et al. An Introduction to Modern Economics. 5th ed. Peason education Limited, 1999.