Tryon, T. (1976). Crowded heads. Fawcett Crest Books.
Cita Chicago (17th ed.)Tryon, Thomas. Crowded Heads. Geenwich, CT: Fawcett Crest Books, 1976.
Cita MLA (9th ed.)Tryon, Thomas. Crowded Heads. Fawcett Crest Books, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.