APA (7th ed.) Citation

Cao, G., & Orru, R. (2014). Current environmental issues and challenges. Springer.

Chicago Style (17th ed.) Citation

Cao, Giacomo, and Roberto Orru. Current Environmental Issues and Challenges. New York: Springer, 2014.

MLA (9th ed.) Citation

Cao, Giacomo, and Roberto Orru. Current Environmental Issues and Challenges. Springer, 2014.