Cita APA (7a ed.)

Whitehead, G. (1982). Economics: Made simple (Twelfth edition.). Heinemann.

Cita Chicago Style (17a ed.)

Whitehead, Geoffrey. Economics: Made Simple. Twelfth edition. London: Heinemann, 1982.

Cita MLA (9a ed.)

Whitehead, Geoffrey. Economics: Made Simple. Twelfth edition. Heinemann, 1982.