APA-referens (7:e uppl.)

Melvin, M. &. B. (2013). Principles of Economics (9th.). Cengage Learning.

Chicago-referens (17:e uppl.)

Melvin, Michael & Boyes. Principles of Economics. 9th. Canada: Cengage Learning, 2013.

MLA-referens (9:e uppl.)

Melvin, Michael & Boyes. Principles of Economics. 9th. Cengage Learning, 2013.