APA (7th ed.) Citation

Bohr, N. On the Quantum Theory of Line-Spectra, Part 1 and 2.

Chicago Style (17th ed.) Citation

Bohr, Niels. On the Quantum Theory of Line-Spectra, Part 1 and 2.

MLA (9th ed.) Citation

Bohr, Niels. On the Quantum Theory of Line-Spectra, Part 1 and 2.

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