Cita APA (7a ed.)

Petersen, F., & Sojo, E. (1992). Extracorporeal biliary lithotripsy by shock waves.

Cita Chicago Style (17a ed.)

Petersen, Federico, y Enrique Sojo. Extracorporeal Biliary Lithotripsy by Shock Waves. 1992.

Cita MLA (9a ed.)

Petersen, Federico, y Enrique Sojo. Extracorporeal Biliary Lithotripsy by Shock Waves. 1992.