Michael, D. N. (1970). The unprepared society: Planning for a precarious future. Harper & Row.
Cita Chicago (17th ed.)Michael, Donald N. The Unprepared Society: Planning for a Precarious Future. N.Y.: Harper & Row, 1970.
Cita MLA (8th ed.)Michael, Donald N. The Unprepared Society: Planning for a Precarious Future. Harper & Row, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.