Davies, S. (2013). Laughology: Improve your life with the science of laughter. Crown House Publishing Limited.
Chicago-viite (17. p.)Davies, Stephanie. Laughology: Improve Your Life with the Science of Laughter. Carmarthen, Wales, UK: Crown House Publishing Limited, 2013.
MLA-viite (9. p.)Davies, Stephanie. Laughology: Improve Your Life with the Science of Laughter. Crown House Publishing Limited, 2013.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.