APA (7th ed.) Citation

Töppel, F., Aiello, A., & Leuchs, G. (2012). All photons are equal but some photons are more equal than others.

Chicago Style (17th ed.) Citation

Töppel, Falk, Andrea Aiello, and Gerd Leuchs. All Photons Are Equal but Some Photons Are More Equal than Others. 2012.

MLA (9th ed.) Citation

Töppel, Falk, et al. All Photons Are Equal but Some Photons Are More Equal than Others. 2012.