Cita APA

Villanova, S., Baume, G., Carraro, G., & Geminale, A. (2004). Optical photometry and spectral classification in the field of the open cluster NGC 6996 in the North America Nebula.

Citación estilo Chicago

Villanova, S., Gustavo Baume, G. Carraro, y A. Geminale. Optical Photometry and Spectral Classification in the Field of the Open Cluster NGC 6996 in the North America Nebula. 2004.

Cita MLA

Villanova, S., Gustavo Baume, G. Carraro, y A. Geminale. Optical Photometry and Spectral Classification in the Field of the Open Cluster NGC 6996 in the North America Nebula. 2004.