APA-referens (7:e uppl.)

Parkin, M. (2005). Economics (7th ed.). Pearson/Addison Wesley.

Chicago-referens (17:e uppl.)

Parkin, Michael. Economics. 7th ed. Boston: Pearson/Addison Wesley, 2005.

MLA-referens (8:e uppl.)

Parkin, Michael. Economics. 7th ed. Pearson/Addison Wesley, 2005.