

References
^ Paul EkmanEmotions Revealed : Recognizing Faces and Feelings to Improve Communication and Emotional Life by Paul Ekman (2007, Paperback) ISBN 9780805083392 (revised Jun 2015)^ Ekman, Paul , Ph.D. (2015). Emotions Revealed, Second Edition Recognizing Faces and Feelings to Improve Communication and Emotional Life, Holt Paperbacks. BiggerBooks. ISBN 9780805083392 (revised Jul 2023)
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