Cita APA (7th ed.)

Schmidt, R. F., & Willis, W. (2007). Encyclopedia of pain. Springer-Verlag Berlin Heidelberg.

Cita Chicago (17th ed.)

Schmidt, Robert F., i W.D Willis. Encyclopedia of Pain. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2007.

Cita MLA (8th ed.)

Schmidt, Robert F., i W.D Willis. Encyclopedia of Pain. Springer-Verlag Berlin Heidelberg, 2007.