Cita APA (7a ed.)

Abt, H. A., & Morrell, N. I. (1993). Rotational Velocities for the Brighter A-Type Stars.

Cita Chicago Style (17a ed.)

Abt, Helmut A., y Nidia Irene Morrell. Rotational Velocities for the Brighter A-Type Stars. 1993.

Cita MLA (8a ed.)

Abt, Helmut A., y Nidia Irene Morrell. Rotational Velocities for the Brighter A-Type Stars. 1993.