APA (7th ed.) Citation

Innis, H. A., & Innis, M. (1972). Empire and communications. University of Toronto Press.

Chicago Style (17th ed.) Citation

Innis, Harold Adams, and Mary Innis. Empire and Communications. [Toronto]: University of Toronto Press, 1972.

MLA (9th ed.) Citation

Innis, Harold Adams, and Mary Innis. Empire and Communications. University of Toronto Press, 1972.