APA (7th ed.) Citation

European Southern Observatory. The Strasbourg-ESO catalogue of galactic planetary nebulae. European Southern Observatory.

Chicago Style (17th ed.) Citation

European Southern Observatory. The Strasbourg-ESO Catalogue of Galactic Planetary Nebulae. Garching bei München: European Southern Observatory.

MLA (9th ed.) Citation

European Southern Observatory. The Strasbourg-ESO Catalogue of Galactic Planetary Nebulae. European Southern Observatory.

Warning: These citations may not always be 100% accurate.