APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.