Cita APA (7a ed.)

Werner, P., Worrall, D., & Birkinshaw, M. (2002). NGC 6251 at multiple scales and wavelengths.

Cita Chicago Style (17a ed.)

Werner, P., D. Worrall, y M. Birkinshaw. NGC 6251 at Multiple Scales and Wavelengths. 2002.

Cita MLA (9a ed.)

Werner, P., et al. NGC 6251 at Multiple Scales and Wavelengths. 2002.