APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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