APA (7th ed.) Citation

Díaz, E., Díaz, E., & Villar, I. Nivel de vida.

Chicago Style (17th ed.) Citation

Díaz, ElenaVillar, Elena Díaz, and Ilia Villar. Nivel De Vida.

MLA (8th ed.) Citation

Díaz, ElenaVillar, et al. Nivel De Vida.

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