Cita APA (7a ed.)

McDonnell, T., & Thompson, D. (2010). Structural Glass Observation Boxes (Willis Tower Ledge). Challenging Glass Conference.

Cita Chicago Style (17a ed.)

McDonnell, T., y D. Thompson. Structural Glass Observation Boxes (Willis Tower Ledge). Challenging Glass Conference, 2010.

Cita MLA (8a ed.)

McDonnell, T., y D. Thompson. Structural Glass Observation Boxes (Willis Tower Ledge). Challenging Glass Conference, 2010.