Robert, H. (1998). Making decisions. Dorling kindersleq.
Chicago Style aipamenaRobert, Heller. Making Decisions. London: Dorling kindersleq, 1998.
MLA aipamenaRobert, Heller. Making Decisions. Dorling kindersleq, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.