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. Web

Citación estilo Chicago

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