Sigafoos, R. A. (1955). The municipal income tax: Its history and problems. Public Administration Service.
Citação norma ChicagoSigafoos, Robert Alan. The Municipal Income Tax: Its History and Problems. Chicago: Public Administration Service, 1955.
Citação norma MLASigafoos, Robert Alan. The Municipal Income Tax: Its History and Problems. Public Administration Service, 1955.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.