APA (7th ed.) Citation

Schmidt, H. <. -. >., & Steinbrück, P. Zug um Zug.

Chicago Style (17th ed.) Citation

Schmidt, Helmut <1918 - >, and Peer Steinbrück. Zug Um Zug.

MLA (8th ed.) Citation

Schmidt, Helmut <1918 - >, and Peer Steinbrück. Zug Um Zug.

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