Cita APA (7th ed.)

Seibert, J. C., & Wills, G. (1970). Marketing research: Selected readings. Penguin.

Cita Chicago (17th ed.)

Seibert, Joseph C., i Gordon Wills. Marketing Research: Selected Readings. Harmondsworth: Penguin, 1970.

Cita MLA (8th ed.)

Seibert, Joseph C., i Gordon Wills. Marketing Research: Selected Readings. Penguin, 1970.