APA (7th ed.) Citation

Freitag, E., & Busam, R. (2005). Complex analysis. Springer.

Chicago Style (17th ed.) Citation

Freitag, E., and R. Busam. Complex Analysis. Berlin ; [Great Britain]: Springer, 2005.

MLA (9th ed.) Citation

Freitag, E., and R. Busam. Complex Analysis. Springer, 2005.