APA (7th ed.) Citation

Friis, E. M. (1994). Early evolution of flowers. Springer-Verlag.

Chicago Style (17th ed.) Citation

Friis, E. M. Early Evolution of Flowers. New York: Springer-Verlag, 1994.

MLA (9th ed.) Citation

Friis, E. M. Early Evolution of Flowers. Springer-Verlag, 1994.