APA (7th ed.) Citation

Curtis, D., & Irvine, I. (2020). Principles of Macroeconomics (2020-A.). Lyryx.

Chicago Style (17th ed.) Citation

Curtis, Doug, and Ian Irvine. Principles of Macroeconomics. 2020-A. [Place of publication not identified]: Lyryx, 2020.

MLA (9th ed.) Citation

Curtis, Doug, and Ian Irvine. Principles of Macroeconomics. 2020-A. Lyryx, 2020.