References
- Bovée CL, Till JV. 2000. Business communication today (6th edn). New York: Prentice Hall.
- Ekman P. 2003. Emotions revealed: understanding faces and feelings. New York: Henry Holt.
- Ekman P. 2009. Telling lies; clues to deceit in the marketplace, politics, and marriage. New York: Norton.
- Ekman P, Friesen WV. 2003. Unmasking the face. New York: Cambridge.
- Faigin G. 1990. The artist's complete guide to facial expressions. New York: Watson-Guptill.
- Havener T. 2009. Ich weiss, was du denkst: Das Geheimnis, Gedanken zu lesen. Reinbech bei Hamburg: Rowohlt.