Cita APA (7th ed.)

SpringerLink (Online service), Douglas, I., & Liu, Z. (2011). Global usability. Springer.

Cita Chicago (17th ed.)

SpringerLink (Online service), Ian Douglas, i Zhengjie Liu. Global Usability. London: Springer, 2011.

Cita MLA (9th ed.)

SpringerLink (Online service), et al. Global Usability. Springer, 2011.