APA (7th ed.) Citation

Roquette, P. (2005). Königsberg mathematicians in the 19th century. Franc Ernst Nejman.

Chicago Style (17th ed.) Citation

Roquette, Peter. "Königsberg Mathematicians in the 19th Century." Franc Ernst Nejman 2005.

MLA (9th ed.) Citation

Roquette, Peter. "Königsberg Mathematicians in the 19th Century." Franc Ernst Nejman, 2005.

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