APA (7th ed.) Citation

Ullrich, K. (1982). DDR. Brockhaus.

Chicago Style (17th ed.) Citation

Ullrich, Klaus. DDR. Leipzig: Brockhaus, 1982.

MLA (8th ed.) Citation

Ullrich, Klaus. DDR. Brockhaus, 1982.

Warning: These citations may not always be 100% accurate.