Zahn, G. C., & Riegle, R. G. (1998). Oral history interview with Gordon Zahn.
Chicago Style aipamenaZahn, Gordon C., and Rosalie G. Riegle. Oral History Interview with Gordon Zahn. 1998.
MLA aipamenaZahn, Gordon C., and Rosalie G. Riegle. Oral History Interview with Gordon Zahn. 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.