Citazione Stile APA (7a Edizione)

Witheford, D. K. (1999). Consultants for DOT preconstruction engineering work. National Academy Press.

Citazione stile Chigago Style (17a edizione)

Witheford, David K. Consultants for DOT Preconstruction Engineering Work. Washington, D.C: National Academy Press, 1999.

Citatione MLA (9a ed.)

Witheford, David K. Consultants for DOT Preconstruction Engineering Work. National Academy Press, 1999.