Cita APA
Gregory, P. R. (1990). Essentials of economics (2nd ed.). Scott, Foresman.
Citación estilo Chicago
Gregory, Paul R. Essentials of Economics. 2nd ed. Glenview, Ill.: Scott, Foresman, 1990.
Cita MLA
Gregory, Paul R. Essentials of Economics. 2nd ed. Scott, Foresman, 1990.
Warning: These citations may not always be 100% accurate.