APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.