APA (7th ed.) Citation

Sgroi, D., Sgroi, D., & Klemperer, P. (2000). Theories of learning in economics.

Chicago Style (17th ed.) Citation

Sgroi, D., Daniel Sgroi, and P. Klemperer. Theories of Learning in Economics. 2000.

MLA (9th ed.) Citation

Sgroi, D., et al. Theories of Learning in Economics. 2000.