Cita APA (7th ed.)

Hooper, J. N. A., Soest, R. W. M. v., & Willenz, P. (2002). Systema porifera: A guide to the classification of sponges. Springer Science+Business Media,LLC.

Cita Chicago (17th ed.)

Hooper, John N. A., R. W. M. van Soest, i Philippe Willenz. Systema Porifera: A Guide to the Classification of Sponges. New York: Springer Science+Business Media,LLC, 2002.

Cita MLA (9th ed.)

Hooper, John N. A., et al. Systema Porifera: A Guide to the Classification of Sponges. Springer Science+Business Media,LLC, 2002.