Marshall, P. (1993). Demanding the impossible: Be realistic Demand the impossible. Fontana Press.
Chicago Style aipamenaMarshall, Peter. Demanding the Impossible: Be Realistic Demand the Impossible. London: Fontana Press, 1993.
MLA aipamenaMarshall, Peter. Demanding the Impossible: Be Realistic Demand the Impossible. Fontana Press, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.