APA (7th ed.) Citation

Franco Contreras Renata, Gáspár Dr. Tamás, & Tóth Dr. László. The contrasts of happiness between third and first world countries.

Chicago Style (17th ed.) Citation

Franco Contreras Renata, Gáspár Dr. Tamás, and Tóth Dr. László. The Contrasts of Happiness Between Third and First World Countries.

MLA (8th ed.) Citation

Franco Contreras Renata, et al. The Contrasts of Happiness Between Third and First World Countries.

Warning: These citations may not always be 100% accurate.