APA (7th ed.) Citation

Keil, G., & Keil, G. (1999). Zollner, Heinrich.

Chicago Style (17th ed.) Citation

Keil, Gundolf, and Gundolf Keil. Zollner, Heinrich. 1999.

MLA (9th ed.) Citation

Keil, Gundolf, and Gundolf Keil. Zollner, Heinrich. 1999.

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