Cita APA (7th ed.)

NOBBS J. (1994). ECONOMICS A CORE TEXT. MC GRAW HILL.

Cita Chicago (17th ed.)

NOBBS J. ECONOMICS A CORE TEXT. NEW YORK: MC GRAW HILL, 1994.

Cita MLA (9th ed.)

NOBBS J. ECONOMICS A CORE TEXT. MC GRAW HILL, 1994.