Cita APA

Bassler, R. S., & Bassler, R. S. (1931). Shelled invertebrates of the past and present: With chapters on geological history. Washington: Smithsonian Institution.

Citación estilo Chicago

Bassler, Ray S., y Ray S. Bassler. Shelled Invertebrates of the Past and Present: With Chapters On Geological History. Washington: Smithsonian Institution, 1931.

Cita MLA

Bassler, Ray S., y Ray S. Bassler. Shelled Invertebrates of the Past and Present: With Chapters On Geological History. Washington: Smithsonian Institution, 1931.