Heshmat, Y. (2009). Determinants of happiness and life satisfaction in Egypt: An empirical study using the world values survey - Egypt 2008. information and decision support center.
Chicago-viite (17. p.)Heshmat, Yasmin. Determinants of Happiness and Life Satisfaction in Egypt: An Empirical Study Using the World Values Survey - Egypt 2008. cairo: information and decision support center, 2009.
MLA-viite (9. p.)Heshmat, Yasmin. Determinants of Happiness and Life Satisfaction in Egypt: An Empirical Study Using the World Values Survey - Egypt 2008. information and decision support center, 2009.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.