Cita APA (7th ed.)

Gill, R. T. (1978). Economics: A text with readings. Goodyear.

Cita Chicago (17th ed.)

Gill, Richard T. Economics: A Text with Readings. Santa Monica.: Goodyear, 1978.

Cita MLA (9th ed.)

Gill, Richard T. Economics: A Text with Readings. Goodyear, 1978.