Cita APA (7a ed.)

Vass, B., Alderdice, R., & Sled, G. (1979). Countdown Canada: A conceptual geography study. Macmillan of Canada.

Cita Chicago Style (17a ed.)

Vass, Ben, Roy Alderdice, y George Sled. Countdown Canada: A Conceptual Geography Study. Toronto, Ont: Macmillan of Canada, 1979.

Cita MLA (9a ed.)

Vass, Ben, et al. Countdown Canada: A Conceptual Geography Study. Macmillan of Canada, 1979.