Tham khảo Biểu_cảm_khuôn_mặt

  1. ↑ Alan J. Fridlund (1994). Human facial expression (ấn bản 1). San Diego: Academic Press. ISBN 978-0-12-267630-7.  Đã bỏ qua tham số không rõ |url-access= (trợ giúp)
  2. ↑ J.A. Russell; J.M. Fernandez Dols (1997). The psychology of facial expression (ấn bản 1). Cambridge University Press. ISBN 978-0-521-58796-9. 
  3. ↑ Nakashima, Satoshi F.; Langton, Stephen R.H.; Yoshikawa, Sakiko (2012). “The effect of facial expression and gaze direction on memory for unfamiliar faces” (PDF). Cognition and Emotion 26 (7): 1316–25. PMID 22077759. doi:10.1080/02699931.2011.619734. 
  4. ↑ Rinn, William E. (1984). “The Neuropsychology of Facial Expression: A Review of the Neurological and Psychological Mechanisms for Producing Facial Expressions”. Psychological Bulletin 95 (1): 52–77. PMID 6242437. doi:10.1037/0033-2909.95.1.52.