Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Seibert, Joseph, y Gordon Wills. Marketing Research: Selected Readings. Harmondsworth [etc.]: Penguin, 1970.

Cita MLA (9a ed.)

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