APA (7th ed.) Citation

Reitner, J., & Keupp, H. (1991). Fossil and Recent Sponges. Springer Berlin Heidelberg.

Chicago Style (17th ed.) Citation

Reitner, J., and Helmut Keupp. Fossil and Recent Sponges. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991.

MLA (9th ed.) Citation

Reitner, J., and Helmut Keupp. Fossil and Recent Sponges. Springer Berlin Heidelberg, 1991.