APA (7th ed.) Citation

Campbell, B. B. (1993). The SA after the Röhm Purge. Journal of contemporary history.

Chicago Style (17th ed.) Citation

Campbell, Bruce B. "The SA After the Röhm Purge." Journal of Contemporary History 1993.

MLA (8th ed.) Citation

Campbell, Bruce B. "The SA After the Röhm Purge." Journal of Contemporary History, 1993.

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