Cita APA (7a ed.)

Wehling, H., & Sperling, W. (1983). DDR. Kohlhammer.

Cita Chicago Style (17a ed.)

Wehling, Hans-Georg, y Walter Sperling. DDR. Stuttgart [u.a.]: Kohlhammer, 1983.

Cita MLA (9a ed.)

Wehling, Hans-Georg, y Walter Sperling. DDR. Kohlhammer, 1983.