Hadlow, R. W. (2001). Elegant arches, soaring spans: C.B. McCullough, Oregon's master bridge builder. Oregon State University Press.
Cita Chicago Style (17a ed.)Hadlow, Robert W. Elegant Arches, Soaring Spans: C.B. McCullough, Oregon's Master Bridge Builder. Corvallis: Oregon State University Press, 2001.
Cita MLA (8a ed.)Hadlow, Robert W. Elegant Arches, Soaring Spans: C.B. McCullough, Oregon's Master Bridge Builder. Oregon State University Press, 2001.
Precaución: Estas citas no son 100% exactas.