APA (7th ed.) Citation

SpringerLink (Online service), Sperlich, S., Hardle, W., & Aydynly, G. The art of semiparametrics.

Chicago Style (17th ed.) Citation

SpringerLink (Online service), Stefan Sperlich, Wolfgang Hardle, and Gokhan Aydynly. The Art of Semiparametrics.

MLA (8th ed.) Citation

SpringerLink (Online service), et al. The Art of Semiparametrics.

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