APA Citation

Blavatsky, H. (1919). The key to theosophy. London.

Chicago Style Citation

Blavatsky, H.P. The Key to Theosophy. London, 1919.

MLA Citation

Blavatsky, H.P. The Key to Theosophy. London, 1919.

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