Cita APA

Reitner, J., & Keupp, H. (1991). Fossil and recent sponges. Springer.

Chicago Edition Citation

Reitner, J., i H. Keupp. Fossil and Recent Sponges. New York: Springer, 1991.

Cita MLA

Reitner, J., i H. Keupp. Fossil and Recent Sponges. Springer, 1991.