Cita APA

Steffen, W., Espindola, M., Martínez, S., & Koning, N. (2009). THE 3D VELOCITY STRUCTURE OF THE PLANETARY NEBULA NGC 7009.

Citación estilo Chicago

Steffen, W., M. Espindola, S. Martínez, y N. Koning. THE 3D VELOCITY STRUCTURE OF THE PLANETARY NEBULA NGC 7009. 2009.

Cita MLA

Steffen, W., M. Espindola, S. Martínez, y N. Koning. THE 3D VELOCITY STRUCTURE OF THE PLANETARY NEBULA NGC 7009. 2009.