Bertolucci, C. (2002). Spanish Steps: External Staircase, Toledo, Spain : Architekten: Lapena & Torres. The Architectural Review.
Cita Chicago (17th ed.)Bertolucci, Carla. "Spanish Steps: External Staircase, Toledo, Spain : Architekten: Lapena & Torres." The Architectural Review 2002.
Cita MLA (8th ed.)Bertolucci, Carla. "Spanish Steps: External Staircase, Toledo, Spain : Architekten: Lapena & Torres." The Architectural Review, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.