APA-viite

Free, R. C. (2010). 21st century economics: A reference handbook. Sage.

Chicago-tyylinen lähdeviittaus

Free, Rhona C. 21st Century Economics: A Reference Handbook. Los Angeles: Sage, 2010.

MLA-viite

Free, Rhona C. 21st Century Economics: A Reference Handbook. Sage, 2010.