Cita APA (7a ed.)

Vasquez, J., Cappa, C. E., & Pineault, S. (2009). Multifrequency study of the ring nebula SG 13.

Cita Chicago Style (17a ed.)

Vasquez, Javier, Cristina Elisabet Cappa, y Serge Pineault. Multifrequency Study of the Ring Nebula SG 13. 2009.

Cita MLA (8a ed.)

Vasquez, Javier, et al. Multifrequency Study of the Ring Nebula SG 13. 2009.