Whitehead, G. (1985). Commerce: Made simple (11th ed.). Heinemann.
Cita Chicago Style (17a ed.)Whitehead, Geoffrey. Commerce: Made Simple. 11th ed. Great Britain: Heinemann, 1985.
Cita MLA (8a ed.)Whitehead, Geoffrey. Commerce: Made Simple. 11th ed. Heinemann, 1985.
Precaución: Estas citas no son 100% exactas.