APA (7th ed.) Citation

Keller, G. (1968). Robert Koch. Egle.

Chicago Style (17th ed.) Citation

Keller, Gottfried. Robert Koch. Gossau: Egle, 1968.

MLA (9th ed.) Citation

Keller, Gottfried. Robert Koch. Egle, 1968.

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