APA (7th ed.) Citation

Spencer, D. E., & Parkin, M. (1990). Study guide: Parkin economics. Addison-Wesley.

Chicago Style (17th ed.) Citation

Spencer, David E., and Michael Parkin. Study Guide: Parkin Economics. Reading, Mass.: Addison-Wesley, 1990.

MLA (9th ed.) Citation

Spencer, David E., and Michael Parkin. Study Guide: Parkin Economics. Addison-Wesley, 1990.