Cita APA (7a ed.)
Pickels, G. W. Drainage and Flood Control Engineering. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Pickels, George W. Drainage and Flood Control Engineering. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Pickels, George W. Drainage and Flood Control Engineering. McGraw-Hill.
Precaución: Estas citas no son 100% exactas.