Trimble, M. R. (2012). Why humans like to cry: Tragedy, evolution and the brain. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Trimble, Michael R. Why Humans like to Cry: Tragedy, Evolution and the Brain. Oxford, England: Oxford University Press, 2012.
Lua MLA (9ú heag.)Trimble, Michael R. Why Humans like to Cry: Tragedy, Evolution and the Brain. Oxford University Press, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.