Clarke, D., Clarke, D. B., & Bradford, M. G. (1989). The Uses of Space by Advertising Agencies within the United Kingdom. Geografiska Annaler. Series B, Human Geography, 71(3), p. 139. doi:10.2307/490849

Clarke, David, D. B. Clarke, and M. G. Bradford. "The Uses of Space By Advertising Agencies Within the United Kingdom." Geografiska Annaler. Series B, Human Geography 71, no. 3 (1989): 139.

Clarke, David, D. B. Clarke, and M. G. Bradford. "The Uses of Space By Advertising Agencies Within the United Kingdom." Geografiska Annaler. Series B, Human Geography 71.3 (1989): 139.