Cita APA (7a ed.)

De Castro, C., & Niemela, V. CCD images and long-slit spectroscopy of the ring nebula around θ Mus.

Cita Chicago Style (17a ed.)

De Castro, C.G.G., y V.S Niemela. CCD Images and Long-slit Spectroscopy of the Ring Nebula Around θ Mus.

Cita MLA (8a ed.)

De Castro, C.G.G., y V.S Niemela. CCD Images and Long-slit Spectroscopy of the Ring Nebula Around θ Mus.