APA-referens (7:e uppl.)

Case, K. (2002). Principles of economics (6th.). Pearson Education.

Chicago-referens (17:e uppl.)

Case, Karl. Principles of Economics. 6th. Delhi: Pearson Education, 2002.

MLA-referens (9:e uppl.)

Case, Karl. Principles of Economics. 6th. Pearson Education, 2002.