Cita APA (7a ed.)

Machado, M., Grossi-Gallegos, H., & Silva, A. (1973). The loop prominence of May 13, 1971 and its associated effects.

Cita Chicago Style (17a ed.)

Machado, M.E, H. Grossi-Gallegos, y A.F Silva. The Loop Prominence of May 13, 1971 and Its Associated Effects. 1973.

Cita MLA (8a ed.)

Machado, M.E, et al. The Loop Prominence of May 13, 1971 and Its Associated Effects. 1973.