APA (7th ed.) Citation

Martin, L. W. (1980). Principles of economics, macro economics. Grid Pub.

Chicago Style (17th ed.) Citation

Martin, Leonard W. Principles of Economics, Macro Economics. Columbus, Ohio: Grid Pub, 1980.

MLA (9th ed.) Citation

Martin, Leonard W. Principles of Economics, Macro Economics. Grid Pub, 1980.