APA Citation
Greenlaw, S. A., & Shapiro, D. (2018). Principles of economics (2nd edition.). Houston, Texas: OpenStax.
Chicago Style CitationGreenlaw, Steven A., and David Shapiro. Principles of Economics. 2nd edition. Houston, Texas: OpenStax, 2018.
MLA CitationGreenlaw, Steven A., and David Shapiro. Principles of Economics. 2nd edition. Houston, Texas: OpenStax, 2018.
Warning: These citations may not always be 100% accurate.