Bull, G. (1977). Directors Hand Book (2nd ed.). McGraw-Hill.
Citación estilo ChicagoBull, George. Directors Hand Book. 2nd ed. Toronto: McGraw-Hill, 1977.
Cita MLABull, George. Directors Hand Book. 2nd ed. McGraw-Hill, 1977.
Precaución: Estas citas no son 100% exactas.