APA (7th ed.) Citation

Weickert, C., & Zahn, R. (1950). Robert Zahn (1870 - 1945).

Chicago Style (17th ed.) Citation

Weickert, Carl, and Robert Zahn. Robert Zahn (1870 - 1945). 1950.

MLA (9th ed.) Citation

Weickert, Carl, and Robert Zahn. Robert Zahn (1870 - 1945). 1950.

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