Why smile? : the science behind facial expressions /
LaFrance, Marianne,1947-
New York ; London : W.W. Norton,
2013, c2011.
"Originally published under the title Lip service : smiles in life, death, trust, lies, work, memory, sex, and politics."
Includes bibliographical references (p. 289-322) and index.
Smiling.
Nonverbal communication.
Body language.