APA (7th ed.) Citation

Gerola, H., & Panagia, N. (1970). On the Spectrum of gaseous nebula of pure hydrogen.

Chicago Style (17th ed.) Citation

Gerola, H., and Nino Panagia. On the Spectrum of Gaseous Nebula of Pure Hydrogen. Frascati, 1970.

MLA (9th ed.) Citation

Gerola, H., and Nino Panagia. On the Spectrum of Gaseous Nebula of Pure Hydrogen. 1970.