APA (7th ed.) Citation

Lewy, G. (1999). Himmler and the "racially pure gypsies".

Chicago Style (17th ed.) Citation

Lewy, Guenter. Himmler and the "Racially Pure Gypsies". 1999.

MLA (8th ed.) Citation

Lewy, Guenter. Himmler and the "Racially Pure Gypsies". 1999.

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