APA (7th ed.) Citation

Skynner, P., Wallace, M., & Tartaro, G. World Trade Center: The challenge of the future.

Chicago Style (17th ed.) Citation

Skynner, Peter, Mike Wallace, and Giorgio Tartaro. World Trade Center: The Challenge of the Future.

MLA (8th ed.) Citation

Skynner, Peter, et al. World Trade Center: The Challenge of the Future.