APA (7th ed.) Citation

Eckert, M. (2014). How Sommerfeld extended Bohr's model of the atom (1913 - 1916).

Chicago Style (17th ed.) Citation

Eckert, Michael. How Sommerfeld Extended Bohr's Model of the Atom (1913 - 1916). 2014.

MLA (9th ed.) Citation

Eckert, Michael. How Sommerfeld Extended Bohr's Model of the Atom (1913 - 1916). 2014.

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