Cita APA (7a ed.)

Lortet, M., & Pitault, A. (1983). Wolf-Rayet Stars; Progenitors of Supernovae? Observatoire de Paris.

Cita Chicago Style (17a ed.)

Lortet, Marie-Claire, y Alain Pitault. Wolf-Rayet Stars; Progenitors of Supernovae? Paris: Observatoire de Paris, 1983.

Cita MLA (9a ed.)

Lortet, Marie-Claire, y Alain Pitault. Wolf-Rayet Stars; Progenitors of Supernovae? Observatoire de Paris, 1983.