Gregory, R. (2004). Squaring the circle: 30 St Mary Axe, London : Architekten: Foster and Partners / Bennett Interior Design. The Architectural Review.
Chicago-Zitierstil (17. Ausg.)Gregory, Rob. "Squaring the Circle: 30 St Mary Axe, London : Architekten: Foster and Partners / Bennett Interior Design." The Architectural Review 2004.
MLA-Zitierstil (8. Ausg.)Gregory, Rob. "Squaring the Circle: 30 St Mary Axe, London : Architekten: Foster and Partners / Bennett Interior Design." The Architectural Review, 2004.
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