Citazione Stile APA (7a Edizione)

Christopher, B. R., & McGuffey, V. C. (1997). Pavement subsurface drainage systems. National Academy Press.

Citazione stile Chigago Style (17a edizione)

Christopher, Barry R., e Verne C. McGuffey. Pavement Subsurface Drainage Systems. Washington, D.C: National Academy Press, 1997.

Citatione MLA (9a ed.)

Christopher, Barry R., e Verne C. McGuffey. Pavement Subsurface Drainage Systems. National Academy Press, 1997.