Cita APA (7a ed.)

Littell, M. (2008). Economics: Concepts and choice. McDougal Littell.

Cita Chicago Style (17a ed.)

Littell, McDougal. Economics: Concepts and Choice. California: McDougal Littell, 2008.

Cita MLA (9a ed.)

Littell, McDougal. Economics: Concepts and Choice. McDougal Littell, 2008.