MLA

Powell, K, and R Bryant. Blueprint Extra 06; Telecommunications Tower, Barcelona. Architects Sir Norman Foster and Partners. London: Wordsearch, 1992.

APA

Powell, K., & Bryant, R. (1992). Blueprint Extra 06; Telecommunications Tower, Barcelona. Architects Sir Norman Foster and Partners. London: Wordsearch.

Chicago

Powell, K., and R Bryant. Blueprint Extra 06; Telecommunications Tower, Barcelona. Architects Sir Norman Foster and Partners. London: Wordsearch, 1992.