Cita APA (7a ed.)
Beardshaw, J. (1998). Economics: A student's guide (4th ed.). PEL.
Cita Chicago Style (17a ed.)
Beardshaw, John. Economics: A Student's Guide. 4th ed. New York: PEL, 1998.
Cita MLA (9a ed.)
Beardshaw, John. Economics: A Student's Guide. 4th ed. PEL, 1998.
Precaución: Estas citas no son 100% exactas.