Cita APA (7a ed.)

Cappa, C. E., Niemelä, V. S., & McClure-Griffiths, N. M. (2003). Neutral Gas Bubbles Surrounding Southern Optical Ring Nebulae: Anon(WR23) and RCW52.

Cita Chicago Style (17a ed.)

Cappa, Cristina Elisabet, Virpi Sinikka Niemelä, y N. M. McClure-Griffiths. Neutral Gas Bubbles Surrounding Southern Optical Ring Nebulae: Anon(WR23) and RCW52. 2003.

Cita MLA (8a ed.)

Cappa, Cristina Elisabet, et al. Neutral Gas Bubbles Surrounding Southern Optical Ring Nebulae: Anon(WR23) and RCW52. 2003.