APA (7th ed.) Citation

Najarro de la Parra, F., Hillier, D. J., & Stahl, O. (1997). A spectroscopic investigation of P Cygni: I. H and He I lines. Astronomy and astrophysics, 326, .

Chicago Style (17th ed.) Citation

Najarro de la Parra, Francisco, D. John Hillier, and Otmar Stahl. "A Spectroscopic Investigation of P Cygni: I. H and He I Lines." Astronomy and Astrophysics 326 (1997).

MLA (9th ed.) Citation

Najarro de la Parra, Francisco, et al. "A Spectroscopic Investigation of P Cygni: I. H and He I Lines." Astronomy and Astrophysics, vol. 326, 1997.