APA stil citiranja

Butković, A. (2014). Sleep duration and personality in Croatian twins: Sleep duration and personality in Croatian twins. Journal of sleep research, p. 3.

Chicago stil citiranja

Butković, Ana. "Sleep duration and personality in Croatian twins: Sleep duration and personality in Croatian twins." 2014: 3.

MLA stil citiranja

Butković, Ana. "Sleep duration and personality in Croatian twins: Sleep duration and personality in Croatian twins." 2014: 3.