Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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