Cita APA (7th ed.)

Sewell, R. B. S. (1971). The free-swimming planktonic copepoda. British Museum.

Cita Chicago (17th ed.)

Sewell, R. B. Seymour. The Free-swimming Planktonic Copepoda. London, U.K: British Museum, 1971.

Cita MLA (9th ed.)

Sewell, R. B. Seymour. The Free-swimming Planktonic Copepoda. British Museum, 1971.