APA (7th ed.) Citation

De Laubenfels, M. W. (1934). New sponges from the Puerto Rican Deep. Smithsonian Institution.

Chicago Style (17th ed.) Citation

De Laubenfels, Max W. New Sponges from the Puerto Rican Deep. Washington: Smithsonian Institution, 1934.

MLA (9th ed.) Citation

De Laubenfels, Max W. New Sponges from the Puerto Rican Deep. Smithsonian Institution, 1934.