Παραπομπή σε μορφή APA (7η εκδ.)

Sigafoos, R. A. (1955). The municipal income tax: Its history and problems. Public Administration Service.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sigafoos, Robert Alan. The Municipal Income Tax: Its History and Problems. Chicago: Public Administration Service, 1955.

Παραπομπή σε μορφή MLA (9th εκδ.)

Sigafoos, Robert Alan. The Municipal Income Tax: Its History and Problems. Public Administration Service, 1955.