Cita APA (7a ed.)

Urquhart, L. C., & O'Rourke, C. E. (1941). Elementary structural engineering. McGraw-Hill.

Cita Chicago Style (17a ed.)

Urquhart, Leonard Church, y Charles Edward O'Rourke. Elementary Structural Engineering. New York: McGraw-Hill, 1941.

Cita MLA (9a ed.)

Urquhart, Leonard Church, y Charles Edward O'Rourke. Elementary Structural Engineering. McGraw-Hill, 1941.