Cita APA (7a ed.)

Weidmann, W. A., & Gamen, R. C. (2010). Central stars of planetary nebulae: New spectral classifications and catalogue.

Cita Chicago Style (17a ed.)

Weidmann, W. A., y Roberto Claudio Gamen. Central Stars of Planetary Nebulae: New Spectral Classifications and Catalogue. 2010.

Cita MLA (8a ed.)

Weidmann, W. A., y Roberto Claudio Gamen. Central Stars of Planetary Nebulae: New Spectral Classifications and Catalogue. 2010.