Clarke, D., Clarke, D. B., & Bradford, M. G. (1992). Competition between television companies for advertising revenue in the United Kingdom: The Independent Television regions prior to deregulation. Environment and Planning A, 24(11), pp. 1627-1644. doi:10.1068/a241627

Clarke, David, D B. Clarke, and M G. Bradford. "Competition between Television Companies for Advertising Revenue in the United Kingdom: The Independent Television Regions Prior to Deregulation." Environment and Planning A 24, no. 11 (1992): 1627-1644.

Clarke, David, D B. Clarke, and M G. Bradford. "Competition between Television Companies for Advertising Revenue in the United Kingdom: The Independent Television Regions Prior to Deregulation." Environment and Planning A 24.11 (1992): 1627-1644.