Noble, D. (2003). The future: Putting Humpty-Dumpty together again.
Cita Chicago (17th ed.)Noble, D. The Future: Putting Humpty-Dumpty Together Again. 2003.
Cita MLA (9th ed.)Noble, D. The Future: Putting Humpty-Dumpty Together Again. 2003.
Atenció: Aquestes cites poden no estar 100% correctes.