MLA

Gottfries, Carl-Gerhard, and Ingvar Karlsson. Depression In Later Life. Oxford: OCC Ldt on behalf of Lundbeck International Neuroscience Foundation, 1997.

APA

Gottfries, C., & Karlsson, I. (1997). Depression in later life. Oxford: OCC Ldt on behalf of Lundbeck International Neuroscience Foundation.

Chicago

Gottfries, Carl-Gerhard, and Ingvar Karlsson. Depression In Later Life. Oxford: OCC Ldt on behalf of Lundbeck International Neuroscience Foundation, 1997.