APA (7th ed.) Citation

ScienceDirect (Online service), Visvizi, A., & Perez del Hoyo, R. (2021). Smart cities and the UN SDGs. Elsevier.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Anna Visvizi, and Raquel Perez del Hoyo. Smart Cities and the UN SDGs. San Diego: Elsevier, 2021.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Smart Cities and the UN SDGs. Elsevier, 2021.