Cita APA (7a ed.)
Pennells, E. (1981). Concrete bridge designer's manual: Reprinted. Cement and Concrete Association.
Cita Chicago Style (17a ed.)
Pennells, Ernest. Concrete Bridge Designer's Manual: Reprinted. London: Cement and Concrete Association, 1981.
Cita MLA (9a ed.)
Pennells, Ernest. Concrete Bridge Designer's Manual: Reprinted. Cement and Concrete Association, 1981.
Precaución: Estas citas no son 100% exactas.