Cita APA

Sommer, U., & Worm, B. (2002). Competition and Coexistence. New York, U.S.A.: Springer.

Citación estilo Chicago

Sommer, Ulrich,, y B. Worm. Competition and Coexistence. New York, U.S.A.: Springer, 2002.

Cita MLA

Sommer, Ulrich,, y B. Worm. Competition and Coexistence. New York, U.S.A.: Springer, 2002.