Cita APA (7a ed.)

Bark, D. L., & Gress, D. (1989). A history of West Germany. Blackwell.

Cita Chicago Style (17a ed.)

Bark, Dennis L., y David Gress. A History of West Germany. Oxford [etc.]: Blackwell, 1989.

Cita MLA (9a ed.)

Bark, Dennis L., y David Gress. A History of West Germany. Blackwell, 1989.