APA (7th ed.) Citation

Muther, A., Reinecke, S., & Österle, H. (1997). Electronic customer care (ECC). Verl. THEXIS.

Chicago Style (17th ed.) Citation

Muther, Andreas, Sven Reinecke, and Hubert Österle. Electronic Customer Care (ECC). St. Gallen: Verl. THEXIS, 1997.

MLA (9th ed.) Citation

Muther, Andreas, et al. Electronic Customer Care (ECC). Verl. THEXIS, 1997.