Παραπομπή σε μορφή APA (7η εκδ.)

Hammerstrom, G. (1976). Descriptive statistics for public policy analysis. Learning Resources in International Studies.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hammerstrom, Gary. Descriptive Statistics for Public Policy Analysis. New York: Learning Resources in International Studies, 1976.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hammerstrom, Gary. Descriptive Statistics for Public Policy Analysis. Learning Resources in International Studies, 1976.