APA (7th ed.) Citation

(1899). On some difficulties of the inner life. The Theosophical Publishing Society etc..

Chicago Style (17th ed.) Citation

On Some Difficulties of the Inner Life. The Theosophical Publishing Society etc., 1899.

MLA (8th ed.) Citation

On Some Difficulties of the Inner Life. The Theosophical Publishing Society etc., 1899.

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