APA (7th ed.) Citation

Aller, L. H. Spectra of the central stars of planetary nebulae. University of California.

Chicago Style (17th ed.) Citation

Aller, Lawrence Hugh. Spectra of the Central Stars of Planetary Nebulae. Los Angeles: University of California.

MLA (9th ed.) Citation

Aller, Lawrence Hugh. Spectra of the Central Stars of Planetary Nebulae. University of California.

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