Cita APA (7th ed.)

(1998). Economics: A student's guide (4th ed.). Pearson Education Limited.

Cita Chicago (17th ed.)

Economics: A Student's Guide. 4th ed. England: Pearson Education Limited, 1998.

Cita MLA (9th ed.)

Economics: A Student's Guide. 4th ed. Pearson Education Limited, 1998.