Nugent J. J. K. et al. Understanding Newborn Behavior and Early Relationships. Baltimore: Brookes Publishing, 2007.

Bucy E. Nonverbal Cues // The International Encyclopedia of Media Effects / eds. P. Rössler, C. A. Hoffner, L. van Zoonen. West Sussex, UK: John Wiley & Sons, 2017; Klofstad C. A., Anderson R. C., Nowicki S. Perceptions of Competence, Strength, and Age Influence Voters to Select Leaders with Lower-Pitched Voices // PLoS ONE. 2015. August 7. Vol. 10. No. 8. P. e013377 // .