Cita APA (7a ed.)

McMENAMIN, M. A. (2008). Early Cambrian sponge spicules from the Cerro Clemente and Cerro Rajón, Sonora, México. Universitat de Barcelona.

Cita Chicago Style (17a ed.)

McMENAMIN, MARK A.S. Early Cambrian Sponge Spicules from the Cerro Clemente and Cerro Rajón, Sonora, México. Universitat de Barcelona, 2008.

Cita MLA (9a ed.)

McMENAMIN, MARK A.S. Early Cambrian Sponge Spicules from the Cerro Clemente and Cerro Rajón, Sonora, México. Universitat de Barcelona, 2008.