APA (7th ed.) Citation

Knoll, P. M., & Kelker, H. (2010). Otto Lehmann: Researcher of the liquid crystals. Books on Demand.

Chicago Style (17th ed.) Citation

Knoll, Peter M., and Hans Kelker. Otto Lehmann: Researcher of the Liquid Crystals. Norderstedt: Books on Demand, 2010.

MLA (9th ed.) Citation

Knoll, Peter M., and Hans Kelker. Otto Lehmann: Researcher of the Liquid Crystals. Books on Demand, 2010.