APA

Ruf M., Voigt A., Kupczyk-Joeris D. & Merk H. R. (20110823). Perforation of the sigmoid colon due to intradiscal spacer dislocation. : European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society.

Chicago

Ruf Michael, Voigt Andreas, Kupczyk-Joeris Dieter and Merk Harry R. 20110823. Perforation of the sigmoid colon due to intradiscal spacer dislocation. : European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society.

Harvard

Ruf M., Voigt A., Kupczyk-Joeris D. and Merk H. R. (20110823). Perforation of the sigmoid colon due to intradiscal spacer dislocation. : European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society.

MLA

Ruf Michael, Voigt Andreas, Kupczyk-Joeris Dieter and Merk Harry R. Perforation of the sigmoid colon due to intradiscal spacer dislocation. : European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 20110823.